Fever and its treatment. Preventive measures to prevent mouse fever

Fever is a protective-adaptive reaction of the body in response to the influence of endo- or exogenous pyrogens (agents that cause a temperature reaction), expressed in increasing the threshold of thermoregulation and temporarily maintaining a higher than usual body temperature.

Fever is characterized not only by an increase in temperature, but also by disruption of all body systems. The degree of temperature increase is important, but not always crucial to assess the severity of fever.

Symptoms of fever:

Fever is accompanied by increased heart rate and respiration, decreased blood pressure, and general symptoms of intoxication: headache, weakness, feeling of heat and thirst, dry mouth, lack of appetite; decreased urine output, increased metabolism due to catabolic processes (destruction processes).

A rapid and severe increase in temperature (for example, with pneumonia) is usually accompanied by chills, which can last from several minutes to an hour, rarely longer.
With severe chills, the patient's appearance is characteristic: due to a sharp narrowing of the blood vessels, the skin becomes pale, the nail plates acquire a bluish color. Feeling cold, patients tremble and chatter their teeth. A gradual increase in temperature is characterized by slight chilling. At high temperatures, the skin has a characteristic appearance: red, warm (“fiery”). A gradual drop in temperature is accompanied by profuse sweat. With fever, the evening body temperature is usually higher than the morning. A rise in temperature above 37°C during the day is a reason to suspect the disease.

Types of fevers:

Depending on the degree of temperature increase, there are the following types fevers.
subfebrile (high) temperature - 37-38°C:
a) low-grade fever 37-37.5°C;
b) low-grade fever 37.5-38°C;
moderate fever 38-39°C;
high fever 39-40°C;
very high fever - over 40°C;
hyperpyretic - 41-42°C, it is accompanied by severe nervous phenomena and is itself life-threatening.

Types of fevers:

Fluctuations in body temperature throughout the day and throughout the entire period are of great importance.

Main types of fever:
constant fever - the temperature remains high for a long time, during the day the difference between morning and evening temperatures does not exceed 1°C; typical for lobar pneumonia, stage II typhoid fever;
laxative (remitting) fever - high temperature, daily temperature fluctuations exceed 1-2°C, with a morning minimum above 37°C; characteristic of tuberculosis, purulent diseases, focal pneumonia, in stage III of typhoid fever;
debilitating (hectic) fever - large (3-4°C) daily temperature fluctuations, alternating with a drop to normal or below, which is accompanied by debilitating sweats; typical for severe pulmonary tuberculosis, suppuration, sepsis;
intermittent (intermittent) fever - short-term increases in temperature to high numbers strictly alternate with periods (1-2 days) of normal temperature; observed in malaria;
undulating (undulating) fever - periodic increases in temperature, and then a decrease in the level to normal numbers, such “waves” follow one after another for a long time; characteristic of brucellosis, lymphogranulomatosis;
relapsing fever - a strict alternation of periods of high temperature with non-febrile periods, while the temperature rises and falls very quickly, febrile and non-febrile phases last for several days each, characteristic of relapsing fever;
reverse type of fever - morning temperature is higher than evening temperature; sometimes observed in sepsis, tuberculosis, brucellosis;
irregular fever - varied and irregular daily fluctuations; often observed in rheumatism, endocarditis, sepsis, tuberculosis; this fever is also called atypical (irregular).

During a fever, there is a period of increasing temperature, a period of high temperature and a period of decreasing temperature.
A sharp decline An elevated temperature (within several hours) to normal is called a crisis, a gradual decrease (over several days) is called lysis.

Stages of fever:

The first stage of fever is characterized by a decrease in heat transfer - a spasm is observed peripheral vessels, decreased skin temperature and sweating. At the same time, the temperature increases, which is accompanied by chills (chills) for one or several hours. Patients complain of headache, general discomfort, nagging pain in the muscles.

With severe chills, the patient's appearance is characteristic: the skin is pale due to sharp capillary spasm, peripheral cyanosis is noted, muscle tremors may be accompanied by chattering of the teeth.

The second stage of fever is characterized by the cessation of temperature rise, heat transfer is balanced with heat production. Peripheral circulation is restored, the skin becomes warm to the touch and even hot, the pallor of the skin is replaced by a bright pink color. Sweating also increases.

In the third stage, heat transfer prevails over heat production, skin blood vessels dilate, and sweating continues to increase. The decrease in body temperature can occur quickly and sharply (critically) or gradually.

Sometimes there is a short-term increase in temperature for several hours (one-day, or ephemeral fever) with mild infections, overheating in the sun, after a blood transfusion, sometimes after intravenous administration medicinal substances. Fever lasting up to 15 days is called acute; fever lasting more than 45 days is called chronic.

Causes of fever:

Most often, the cause of fever is infectious diseases and the formation of tissue breakdown products (for example, a focus of necrosis or myocardial infarction). Fever is usually the body's response to an infection. Sometimes an infectious disease may not manifest itself as fever or may occur temporarily without an increase in temperature (tuberculosis, syphilis, etc.).

The degree of temperature increase largely depends on the patient’s body: for the same disease, different persons it may be different. Thus, in young people with high reactivity of the body, an infectious disease can occur with a temperature of up to 40 ° C and above, while the same infectious disease in older people with weakened reactivity can occur with a normal or slightly elevated temperature. The degree of temperature increase does not always correspond to the severity of the disease, which is also associated with individual characteristics body reaction.

Fever in infectious diseases is the earliest and most typical reaction to the introduction of a microbial agent. In this case, bacterial toxins or waste products of microorganisms (viruses) are exogenous pyrogens. They also cause another defensive reaction, which consists in the development of stress mechanisms with increased release of neutrophilic leukocytes.

An increase in temperature of non-infectious origin is often observed with malignant tumors, tissue necrosis (for example, during a heart attack), hemorrhages, rapid breakdown of red blood cells in the blood, and the subcutaneous or intravenous administration of foreign protein substances. Fever is much less common in diseases of the central nervous system, as well as of reflex origin. At the same time, temperature rises are more often observed in the daytime, so there is a need to measure it hourly.

Fever of central origin can be observed with injuries and diseases of the central nervous system; it has a severe malignant course. Heat can develop without the participation of pyrogens during severe emotional stress.

Fever is characterized not only by the development of high temperature, but also by disruption of the functioning of all body systems. The maximum level of the temperature curve is important, but not always decisive, for assessing the severity of fever.

In addition to high temperature, fever is accompanied by increased heart rate and breathing, decreased blood pressure, and the appearance of general symptoms of intoxication: headache, malaise, feelings of heat and thirst, dry mouth, lack of appetite; decreased urine output, increased metabolism due to catabolic processes. At the peak of a febrile state, in some cases, confusion, hallucinations, delirium, and even complete loss of consciousness can be observed. However, for the most part, these phenomena reflect the peculiarities of the course of the infectious process itself, and not just the febrile reaction.

The pulse rate during fever is directly related to the level of high temperature only in benign fevers caused by low-toxic pyrogens. This does not happen with all infectious diseases. For example, typhoid fever is characterized by a pronounced decrease in heart rate against the background of severe fever. In such cases, the effect of high temperature on frequency heart rate weakened by the influence of others causal factors and mechanisms of disease development. The respiratory rate also increases with the development of high fever. At the same time, breathing becomes more shallow. However, the severity of decreased breathing does not always correspond to the level of high temperature and is subject to significant fluctuations.

During the febrile period, the function of the digestive tract is always impaired in patients. Usually there is a complete absence of appetite, which is associated with decreased digestion and absorption of food. The tongue becomes coated various shades(usually white), patients complain of dry mouth.

The volume of secretions from the digestive glands (salivary, gastric, pancreas, etc.) is significantly reduced. Motor dysfunction gastrointestinal tract are expressed in various types of violations motor functions, usually with a predominance of spastic phenomena. As a result, the movement of intestinal contents slows down significantly, as does the release of bile, the concentration of which increases.

There are no noticeable changes in kidney activity during fever. An increase in daily urination in the first stage (an increase in temperature) depends on an increase in blood flow in the kidneys due to the redistribution of blood in the tissues. On the contrary, a slight decrease in urination with increased urine concentration at the height of the febrile reaction is explained by fluid retention.

One of essential components The protective-adaptive mechanism of fever is an increase in the phagocytic activity of leukocytes and tissue macrophages, and, what is especially important, there is an increase in the intensity of antibody production. Activation of cellular and humoral mechanisms immunity allows the body to adequately respond to the introduction of foreign agents and stop infectious inflammation.

High temperature itself can create unfavorable conditions for the proliferation of various pathogens and viruses. In light of the above, the purpose of developing a feverish reaction developed during evolution is clear. That is why fever is a nonspecific symptom of a large number of different infectious diseases.

Diagnosis and differential diagnosis of fever:

Fever is often the earliest symptom infectious disease and the decisive reason for the patient to see a doctor. A number of infections have a typical temperature curve. The level of temperature increase, the duration and nature of the fever, as well as the frequency of its occurrence can be a significant aid in diagnosis. However, it is almost impossible to recognize the infection in the first days by fever alone without additional symptoms.

The duration of the febrile period allows us to divide all such conditions into short-term (acute) and long-term (chronic). The former include high fever lasting no more than two weeks, the latter - more than two weeks.

Acute fevers lasting no more than one week most often arise due to various viral infections upper respiratory tract and stop on their own without outside intervention. A number of short-term bacterial infections also cause acute fever. Most often they affect the pharynx, larynx, middle ear, bronchi, and genitourinary system.

If the fever persists for a longer period, then even with the apparent clarity of the clinical picture, the patient requires a more thorough examination. If prolonged fever is not consistent with other clinical manifestations or the general condition of the patient, the term “fever” is usually used. unknown etiology"(LNE).

The following febrile conditions are distinguished:
A. Acute:
I. Viral.
II. Bacterial.
B. Chronic:
I. Infectious:
viral ( Infectious mononucleosis, viral hepatitis B, cytomegalovirus infection, HIV);
bacterial (tuberculosis, brucellosis, septic endocarditis, etc.);
in persons with secondary immunodeficiency.
II. Tumor.
III. For systemic connective tissue diseases.
IV. For other conditions and diseases (endocrine, allergic, increased sensitivity threshold of the thermoregulation center).

Diseases and illnesses, causes of fever:

Among the infectious causes of prolonged chronic fever, tuberculosis should be noted primarily. Difficulties in diagnosing a number of forms of this disease and the threatening epidemiological situation require mandatory diagnostic tests for tuberculosis in all long-term febrile patients. Among the less common causes of chronic fever, diseases such as brucellosis, toxoplasmosis, salmonellosis, and cytomegalovirus infection (in children and debilitated patients) should be noted. In addition, among diseases of viral origin, prolonged febrile states can be caused by viral hepatitis (especially hepatitis B), as well as infectious mononucleosis.

Non-infectious causes prolonged fever occur in no more than one third of cases. These include fever in subacute septic endocarditis, which is quite difficult to diagnose in the initial absence of a heart murmur. In addition, blood cultures do not detect the presence of bacteria in the blood in 15% of cases. Often there are no peripheral signs of the disease (enlarged spleen, Osler's nodes, etc.).

For purulent infection:

Purulent infection of organs abdominal cavity and extraperitoneal localization (subhepatic and subphrenic abscesses, pyelonephritis, apostematous nephritis and renal carbuncle, purulent cholangitis and biliary tract obstruction) can also lead to the development of long-term febrile conditions. In addition to the latter, the cause of chronic fever can be inflammatory processes in the female genital area, but in this case the fever most often occurs as a long-term low-grade fever.

About 20-40% of fevers of unknown etiology (with an unknown cause) can be caused by systemic pathology of connective tissue (systemic lupus erythematosus, systemic scleroderma, rheumatoid polyarthritis, Sjögren's disease, etc.). Among other causes, the most important are tumor processes. Among the latter, a special place is occupied by tumors originating from the hematopoietic system (leukemia, lymphogranulomatosis, etc.). In some cases, fever may be due to the addition of an infection, as, for example, with bronchial carcinoma, when obstruction (difficulty breathing) and pneumonia of the underlying part of the lung develops.

For pathology of the endocrine system:

Prolonged fevers can occur with pathology of the endocrine system (Addison's disease, thyrotoxicosis). In a number of patients, after a detailed examination and in the absence of any pathological changes, we can talk about an increase in the sensitivity threshold of the thermoregulation center. Acquired immunodeficiency syndrome caused by HIV infection occupies a special place among the causes of prolonged fevers. The initial period of AIDS is characterized by a prolonged increase in temperature above 38°C, constant or intermittent. In combination with widespread lymphadenopathy, this condition should serve as a reason for an emergency serological examination of the patient for HIV.

IN mandatory minimum laboratory tests of long-term febrile patients include general analysis blood with leukocyte count, determination of malarial plasmodia in a smear, tests functional state liver, bacteriological cultures of urine, feces and blood up to 3-6 times. In addition, it is necessary to carry out the Wasserman reaction, tuberculin and streptokinase tests, serological test for HIV, as well as X-ray examination lungs and ultrasound of the abdominal organs.

Even the presence of minor complaints of moderate headache, mild changes in mental status require a puncture of the cerebrospinal fluid with its subsequent examination. In the future, if the diagnosis continues to remain unclear, focusing on the results initial examination, the patient should determine the presence of such signs as antinuclear antibodies, rheumatoid factor, antibodies to Brucella, Salmonella, Toxoplasma, Histoplasma, Epstein-Barr virus, cytomegaly, etc., and also conduct a study for fungal diseases(candidiasis, aspergillosis, trichophytosis).

The next stage of examination in case of an unknown diagnosis in a long-term febrile patient is to carry out computed tomography, which allows you to localize tumor changes or abscesses of internal organs, as well as intravenous pyelography, puncture and culture bone marrow, endoscopy of the gastrointestinal tract.

If the cause of prolonged fever cannot be determined, it is recommended that such patients be given a trial of treatment, usually antibiotic therapy or specific anti-tuberculosis drugs. If the patient is already receiving treatment, it should be discontinued for a while to exclude the medicinal nature of the fever.

Drug fever:

Drug fever develops as a result of an allergic reaction to the administered drug(s) and is usually accompanied by lymphocytosis with eosinophilia (increased levels of lymphocytes and eosinophils) and a variety of rashes, although in some cases these symptoms may not be present.

Fever due to tumors:

Secondary immunodeficiency occurs in patients with tumor processes receiving specific therapy, including radiation, in persons with induced immunosuppression, as well as in the majority of patients frequently taking antibiotics. Often the cause of fever in such patients is an infection caused by opportunistic flora. They are also the population most susceptible to nosocomial infections.

In addition to staphylococcus, streptococcus and anaerobes, pathogens in inpatients with immunodeficiency can be fungi of the genus Candida and Aspergillus, pneumocystis, toxoplasma, listeria, legionella, cytomegalovirus and herpes viruses. Evaluation of such patients should begin with bacteriological research cultures of blood, urine, feces and sputum, as well as cerebrospinal fluid (depending on the clinical manifestations of the infection).

It is often necessary to start antibiotic therapy before results are obtained bacteriological culture. In such cases, one should focus on the most characteristic nature of the pathogen for a given localization of infection in the patient (streptococci and E. coli, as well as anaerobes for enterocolitis, E. coli and Proteus for urinary tract infections).

To recognize the causes of acute fevers, the nature of the temperature rise, its frequency and height, as well as its duration are of utmost importance. different periods fever. Various durations period of increased temperature may be a characteristic sign of a number of acute infectious processes. For example, for brucellosis and typhoid fever, a gradual increase in the temperature curve over several days to a maximum is typical.

Influenza, typhus, measles and most viral diseases of the respiratory tract are characterized by a short - no more than a day - period of temperature rise to high numbers. The most acute onset of the disease, when the temperature reaches its maximum within a few hours, is typical for meningococcal infection, relapsing fever, malaria. IN differential diagnosis The causes of febrile conditions should be based not only on one symptom (fever), but on the entire symptom complex of features of the course of a period of high temperature.

Rickettsial infections are typically characterized by a combination of acute development of fever with persistent headache and insomnia, as well as facial redness and motor agitation of the patient. The appearance of a typical rash on the 4th-5th day of the disease makes it possible to diagnose the clinical picture of typhus.

For typhus:

Typhus Fever - Important clinical sign diseases. Usually the temperature rises within 2-3 days to 39-40°C. The temperature rises both in the evening and in the morning. Patients experience slight chills. From the 4th-5th day of illness, a constant type of fever is characteristic. Sometimes, with early use of antibiotics, a remitting type of fever is possible. With typhus, "cuts" in the temperature curve may be observed. This usually happens on the 3-4th day of illness, when the body temperature drops by 1.5-2°C, and the next day, with the appearance of a rash on the skin, it rises again to high numbers.

This is observed at the height of the disease. On the 8-10th day of illness, patients with typhus may also experience an “incision” in the temperature curve, similar to the first. But then after 3-4 days the temperature drops to normal. Typical febrile reactions are rare when antibiotic therapy is used. With uncomplicated typhus, the fever usually lasts 2-3 days, less often - 4 days or more.

Borelliosis (recurrent louse and tick-borne typhus) are characterized by a rapid rise in temperature to high numbers, accompanied by severe symptoms of intoxication and stunning chills. For 5-7 days, the high temperature remains at the achieved level, after which it critically drops to normal numbers, and then after 7-8 days the cycle repeats.

For typhoid fever:

Fever is a constant and characteristic symptom of typhoid fever. Basically, this disease is characterized by a wave-like course, in which temperature waves seem to roll over one another. In the middle of the last century, the German physician Wunderlich schematically described the temperature curve. It consists of a phase of rising temperature (lasting about a week), a phase of high temperature (up to two weeks) and a phase of falling temperature (about 1 week). Currently, due to early use antibiotics temperature curve at typhoid fever They have different options and are varied. Most often, remitting fever develops and only when severe course- permanent type.

For leptospirosis:

Leptospirosis is one of the acute febrile diseases. For leptospirosis, a typical increase in temperature during the day to 39-41 ° C with the parallel occurrence of severe intoxication (headache, nausea, vomiting, muscle pain) and (sometimes) abdominal pain. This is a disease of humans and animals, characterized by intoxication, undulating fever, hemorrhagic syndrome, damage to the kidneys, liver, and muscles. The temperature remains at high levels for 6-9 days. A remitting type of temperature curve with fluctuations of 1.5-2.5°C is characteristic. Then the body temperature returns to normal. Most patients experience repeated waves, when after 1-2 (less often 3-7) days of normal body temperature, it again increases to 38-39°C for 2-3 days.

For malaria:

Malarial attacks are characterized by strict periodicity (except for tropical malaria). Often there is a preceding period (1-3 days), after which characteristic attacks of fever are observed, with an interval of 48 or 72 hours, when, against the background of stunning chills, a rise in temperature is noted for 30-40 minutes (less often 1-2 hours) to 40-41°C with severe headache, nausea (less often vomiting). After 5-9 hours of persistent high temperature, increased sweating begins and a critical decrease in temperature to normal or slightly elevated numbers. Tropical malaria characterized by the presence of longer attacks of high temperature against the background of a shortened fever-free period. The boundary between them is blurred, sometimes chills and sweats may not be observed at all.

For erysipelas also characterized by an acute onset and the absence of a preceding period. The temperature rise reaches 39-40°C and may be accompanied by vomiting and agitation. Usually, pain and burning immediately occur in the affected area of ​​the skin, which soon becomes bright red in color with a ridge that sharply limits the area of ​​inflammation.

For meningitis:

Meningococcemia and meningococcal meningitis are also characterized by an acute onset with a rapid rise in temperature and severe chills. An acute headache is typical, and there may be vomiting and agitation. Meningitis is typically characterized by the appearance of increased skin sensitivity, and then meningeal signs (numbness occipital muscles, Kernig's and Brudzinski's symptoms). With meningococcemia, after a few (4-12) hours a star-shaped hemorrhagic rash appears on the skin.

With meningococcal infection, body temperature can range from slightly elevated to very high (up to 42°C). The temperature curve can be of a constant, intermittent and remitting type. During antibiotic therapy, the temperature decreases by the 2-3rd day; in some patients, a slightly elevated temperature remains for another 1-2 days.

Meningococcemia (meningococcal sepsis) begins acutely and proceeds rapidly. A characteristic feature is a hemorrhagic rash in the form of stars of irregular shape. Elements of the rash in the same patient can be of different sizes - from small pinpoints to extensive hemorrhages. The rash appears 5-15 hours after the onset of the disease. Fever with meningococcemia is often intermittent. Characteristics: pronounced symptoms of intoxication, temperature rises to 40-41°C, severe chills, headache, hemorrhagic rash, increased heart rate, shortness of breath, cyanosis. Then blood pressure drops sharply. Body temperature drops to normal or slightly elevated levels. Motor excitement increases, convulsions appear. And in the absence of appropriate treatment, death occurs.

Meningitis may not only be of meningococcal origin. Meningitis, like encephalitis (inflammation of the brain), develops as a complication of any previous infection. Thus, the most harmless, at first glance, viral infections, such as influenza, chicken pox, rubella, can be complicated by severe encephalitis. There is usually a high body temperature, sharp deterioration general condition, cerebral disorders, headache, dizziness, nausea, vomiting, impaired consciousness, and general anxiety appear. Depending on the damage to a particular part of the brain, various symptoms may be detected - disorders of the cranial nerves, paralysis.

Hemorrhagic fevers:

A large group of acute infectious diseases consists of various hemorrhagic fevers, which are characterized by pronounced focality (Crimean, Omsk and hemorrhagic fever with renal syndrome). They typically have an acute onset with a period of temperature rising to 39-40°C during the day, severe headache, insomnia, pain in the muscles and eyeballs. There is facial redness and upper half torso, scleral injection. The condition of the patients is progressively worsening. On the 2-3rd day, a hemorrhagic rash appears in typical places (with Omsk fever, the rash develops against the background of the second febrile wave).

Fever due to influenza:

Influenza is characterized by an acute onset with chills and a short (4-5 hours) period of temperature rise to 38-40°C. In this case, severe intoxication develops with the appearance of headache and muscle pain, weakness, and dizziness. There are catarrhal phenomena in the nasopharynx, there may be conjunctivitis, and symptoms of tracheitis appear a little later. The duration of the febrile period usually does not exceed 5 days. Parainfluenza is characterized by the absence of prolonged fever; it can be unstable or short-term (1-2 days, as with a common viral respiratory tract infection), usually does not exceed 38-39 ° C.

Fever with measles in adults:

Measles is much more severe in adults than in children, and is characterized by a period of temperature rise during the day to 38-39°C against the background of severe catarrhal symptoms. On the 2-3rd day of the disease, it is already possible to identify Filatov-Koplik spots on the mucous membrane inner surface cheeks On the 3-4th day, large-spotted papular rashes are noted, first on the face, and then on the torso and limbs. For acute form Brucellosis is characterized by high fever with chills up to 40°C, in which, however, a number of patients remain in satisfactory health.

The headache is moderate, and excessive sweating (or heavy sweats) is typical. There is an increase in all groups of lymph nodes, an enlargement of the liver and spleen. The disease usually begins gradually, less often acutely. Fever in the same patient can be different. Sometimes the disease is accompanied by a wave-like temperature curve typical for brucellosis of a remitting type, when fluctuations between morning and evening temperatures are more than 1 ° C, intermittent - a decrease in temperature from high to normal, or constant - fluctuations between morning and evening temperatures do not exceed 1 ° C.

Feverish waves are accompanied by profuse sweating. The number of waves of fever, their duration and intensity are different. The intervals between waves range from 3-5 days to several weeks and months. Fever can be high, low-grade for a long time, or it can be normal. The disease most often occurs with long-term low-grade fever. Characteristic is the replacement of a long febrile period with a fever-free interval, also of varying duration. Despite the high temperature, the condition of the patients remains satisfactory. With brucellosis, damage is noted various organs and systems, the musculoskeletal, urogenital (genitourinary), nervous systems are primarily affected, the liver and spleen are enlarged.

For yersinosis:

Yersiniosis has several clinical forms, but all of them (except subclinical) are characterized by an acute onset with chills, headache and muscle pain and an increase in temperature to 38-40°C. The average duration of the febrile period is 5 days; in septic forms there is an irregular type of fever with repeated episodes of chills and profuse sweating. At adenovirus infection the temperature rises to 38-39°C within 2-3 days. Fever may be accompanied by chills and last for about a week. The temperature curve is constant or remitting in nature. The symptoms of general intoxication during adenovirus infection are usually mild.

For infectious mononucleosis:

Infectious mononucleosis often begins acutely, less often gradually. The increase in temperature is usually gradual. Fever can be of a constant type or with large fluctuations. The febrile period depends on the severity of the disease. In mild forms it is short (3-4 days), in severe forms it lasts up to 20 days or more. The temperature curve can be different - constant or remitting type. Fever may be slightly elevated. High temperature events (40-41°C) are rare. Temperature changes during the day with ranges of 1-2°C and a lytic decrease are characteristic.

Fever due to polio:

With polio, an acute viral disease of the central nervous system, there is also an increase in temperature. Various parts of the brain and spinal cord are affected. The disease occurs predominantly in children under 5 years of age. Early symptoms illnesses are chills, gastrointestinal disorders(diarrhea, vomiting, constipation), body temperature rises to 38-39°C or more. With this disease, a double-humped temperature curve is often observed: the first rise lasts 1-4 days, then the temperature decreases and remains within the normal range for 2-4 days, then it rises again. There are cases when the body temperature rises within a few hours and remains unnoticed, or the disease proceeds according to the type general infection without neurological symptoms.

For psittacosis:

Psittacosis is a disease that occurs as a result of human infection from sick birds. The disease is accompanied by fever and atypical pneumonia. Body temperature rises to high levels from the first days. The febrile period lasts 9-20 days. The temperature curve can be constant or remitting. In most cases it decreases gradually. The height, duration of fever, and the nature of the temperature curve depend on the severity and clinical form diseases. At mild flow body temperature rises to 39°C and lasts 3-6 days, decreasing within 2-3 days. With moderate severity, the temperature rises above 39°C and remains at high levels for 20-25 days. An increase in temperature is accompanied by chills, a decrease - profuse sweating. Psittacosis is characterized by fever, symptoms of intoxication, frequent lung damage, and enlarged liver and spleen. The disease can be complicated by meningitis.

Fever due to tuberculosis:

The tuberculosis clinic is diverse. Fever in patients can occur for a long time without detected organ damage. Most often, body temperature remains at elevated levels. The temperature curve is intermittent, usually not accompanied by chills. Sometimes fever is the only sign of illness. Tuberculosis process not only the lungs, but also other organs and systems (lymph nodes, bone, genitourinary system). In weakened patients, tuberculous meningitis may develop. The disease begins gradually. Symptoms of intoxication, lethargy, drowsiness, photophobia gradually increase, body temperature remains at elevated levels. Subsequently, the fever becomes constant, distinct meningeal signs, headache, and drowsiness are detected.

For sepsis:

Sepsis is a severe general infectious disease that occurs due to insufficient local and general immunity of the body in the presence of a focus of inflammation. It develops mainly in premature infants, those weakened by other diseases, and survivors of trauma. Diagnosed by a septic focus in the body and entrance gate infections, as well as symptoms of general intoxication. Body temperature often remains at elevated levels, and high temperatures are occasionally possible. The temperature curve can be hectic in nature. Fever is accompanied by chills, and a decrease in temperature is accompanied by sudden sweating. The liver and spleen enlarge. Rashes on the skin are common, often hemorrhagic in nature.

An increase in body temperature can be observed with various diseases of the lungs, heart, and other organs. So, inflammation of the bronchi ( acute bronchitis) can occur during acute infectious diseases (influenza, measles, whooping cough, etc.) and when the body cools. Body temperature in acute focal bronchitis can be slightly elevated or normal, and in severe cases it can rise to 38-39°C. Weakness, sweating, and cough are also concerning.

The development of focal pneumonia (pneumonia) is associated with the transition inflammatory process from bronchi to lung tissue. They can be of bacterial, viral, fungal origin. Most characteristic symptoms focal pneumonia are cough, fever and shortness of breath. Fever in patients with bronchopneumonia varies in duration. The temperature curve is often of a laxative type (daily temperature fluctuations of 1°C, with the morning minimum above 38°C) or of an irregular type. Often the temperature is slightly elevated, and in the elderly and old age may be absent altogether.

Lobar pneumonia is more often observed when the body is hypothermic. Lobar pneumonia is characterized by a certain cyclical course. The disease begins acutely, with tremendous chills and an increase in body temperature to 39-40°C. Chills usually last up to 1-3 hours. The condition is very serious. Shortness of breath and cyanosis are noted. At the height of the disease, the condition of patients worsens even more. Symptoms of intoxication are pronounced, breathing is frequent, shallow, tachycardia up to 100/200 beats/min.

Against the background of severe intoxication, vascular collapse may develop, which is characterized by a drop in blood pressure, increased heart rate, and shortness of breath. Body temperature also drops sharply. The nervous system suffers (sleep is disturbed, there may be hallucinations, delusions). With lobar pneumonia, if antibiotic treatment is not started, the fever can last for 9-11 days and be permanent. The temperature drop can occur critically (within 12-24 hours) or gradually over 2-3 days. During the resolution stage, there is usually no fever. Body temperature returns to normal.

For rheumatism:

Fever can accompany a disease such as rheumatism. It has an infectious-allergic nature. With this disease, connective tissue is damaged, mainly affecting the cardiovascular system, joints, central nervous system and other organs. The disease develops 1-2 weeks after a streptococcal infection (sore throat, scarlet fever, pharyngitis). Body temperature usually rises slightly, weakness and sweating appear. Less commonly, the disease begins acutely, the temperature rises to 38-39°C.

The temperature curve is remitting in nature, accompanied by weakness and sweating. After a few days, joint pain appears. Rheumatism is characterized by damage to the heart muscle with the development of myocarditis. The patient is concerned about shortness of breath, pain in the heart area, and palpitations. There may be a slight increase in body temperature. The febrile period depends on the severity of the disease. Myocarditis can also develop with other infections - scarlet fever, diphtheria, picquetheiasis, viral infections. Allergic myocarditis may occur, for example, when using various medications.

For endocarditis:

Against the background of an acute severe septic condition, the development of septic endocarditis - inflammatory lesion endocardium with damage to the heart valves. The condition of such patients is very serious. Symptoms of intoxication are expressed. Worried about weakness, malaise, sweating. Initially, there is a slight increase in body temperature. Against the background of a slightly elevated temperature, irregular rises in temperature to 39 ° C and above (“temperature candles”) occur; chilling and profuse sweating, damage to the heart and other organs and systems is noted.

Diagnosis of primary bacterial endocarditis is particularly difficult, since at the onset of the disease there is no damage to the valve apparatus, and the only manifestation of the disease is fever of the wrong type, accompanied by chills, followed by profuse sweating and a decrease in temperature. Sometimes a rise in temperature may occur during the day or at night. Bacterial endocarditis can develop in patients with artificial valves hearts. In some cases, there are fevers caused by the development of a septic process in patients with catheters in the subclavian veins, which are used in infusion therapy.

In case of damage to the biliary system:

A febrile state can occur in patients with damage to the biliary system, liver (cholangitis, liver abscess, accumulation of pus in gallbladder). Fever in these diseases can be the leading symptom, especially in senile and elderly patients. Such patients are usually not bothered by pain and there is no jaundice. The examination reveals an enlarged liver and slight pain.

For kidney disease:

An increase in temperature is observed in patients with kidney disease. This is especially true for acute pyelonephritis, which is characterized by a severe general condition, symptoms of intoxication, high fever wrong type, chills, dull pain in the lumbar region. When inflammation spreads to bladder and urethra there is a painful urge to urinate and pain when urinating. The source of prolonged fever can be a urological purulent infection (abscesses and carbuncles of the kidneys, paranephritis, nephritis). Characteristic changes in urine in such cases may be absent or mild.

For tumor diseases:

The leading place among febrile conditions is occupied by tumor diseases. An increase in temperature can occur with any malignant tumors. Fever is most often observed in hypernephroma, tumors of the liver, stomach, malignant lymphomas, and leukemia. With malignant tumors, especially small hypernephroid cancers and lymphoproliferative diseases, severe fever may occur. In such patients, fever (usually in the morning) is associated with the disintegration of the tumor or the addition of a secondary infection. Features of fever in malignant diseases are the wrong type of fever, often with a maximum rise in the morning, and the lack of effect of antibiotic therapy.

Often, fever is the only symptom of a malignant disease. Feverish conditions often occur with malignant tumors of the liver, stomach, intestines, lungs, and prostate gland. There are cases where fever for a long time was the only symptom of malignant lymphoma localized in the retroperitoneal lymph nodes. The main causes of fever in cancer patients are considered to be the accession infectious complications, tumor growth and the effect of tumor tissue on the body. The third place in the frequency of febrile conditions is occupied by systemic diseases connective tissue (collagenosis). This group includes systemic lupus erythematosus, scleroderma, arteritis nodosa, dermatomyositis, rheumatoid arthritis.

Systemic lupus erythematosus is characterized by a steady progression of the process, sometimes with rather long remissions. In the acute period there is always a fever of the wrong type, sometimes taking on a hectic character with chills and profuse sweat. Characterized by dystrophies, damage to the skin, joints, various organs and systems.

For systemic vasculitis:

It should be noted that common connective tissue diseases and systemic vasculitis relatively rarely manifest as an isolated febrile reaction. They usually appear characteristic lesion skin, joints, internal organs. Basically, fevers can occur with various vasculitis, often their localized forms (temporal arteritis, lesion large branches aortic arch). IN initial period such diseases, fever appears, which is accompanied by pain in muscles, joints, weight loss, then localized headaches appear, thickening and induration are detected temporal artery. Vasculitis is more common in older people.

Among patients with prolonged fever, drug fever occurs in 5-7% of cases. It can occur on any medications, often on the 7-9th day of treatment. Diagnosis is facilitated by the absence of an infectious or somatic disease, the appearance of a papular rash on the skin, coinciding with the time of taking medications. This fever is characterized by one feature: the symptoms of the underlying disease disappear during therapy, and the body temperature rises. After discontinuation of the drug, body temperature usually normalizes within 2-3 days.

For endocrine diseases:

An increase in body temperature is observed in various endocrine diseases. First of all, this group includes the following: serious disease as diffuse toxic goiter (hyperthyroidism). The development of this disease is associated with excess production of thyroid hormones. Numerous hormonal, metabolic, autoimmune disorders lead to damage to all organs and systems, disruption of the functions of other endocrine glands And various types exchange. The nervous, cardiovascular, and digestive systems are primarily affected. Patients experience general weakness, fatigue, palpitations, sweating, trembling hands, protrusion of the eyeballs, loss of body weight, and enlargement of the thyroid gland.

Thermoregulation disorder is manifested by an almost constant feeling of heat, intolerance to heat, thermal procedures, and slightly elevated body temperature. An increase in temperature to high numbers (up to 40°C and above) is typical for complications of diffuse toxic goiter- thyrotoxic crisis, which occurs in patients with severe forms of the disease. All symptoms of thyrotoxicosis sharply worsen. A pronounced excitement appears, reaching the point of psychosis, the pulse quickens to 150-200 beats/min. The skin of the face is red, hot, moist, the limbs are cyanotic. Are developing muscle weakness, trembling of the limbs, pronounced paralysis and paresis.

Acute purulent thyroiditis - purulent inflammation thyroid gland. It can be caused by various bacteria - staphylococcus, streptococcus, pneumococcus, E. coli. It occurs as a complication of purulent infection, pneumonia, scarlet fever, abscesses. The clinical picture is characterized by an acute onset, an increase in body temperature to 39-40°C, chills, rapid heartbeat, severe pain in the neck, shifting to lower jaw, ears, worse when swallowing, moving the head. The skin over the enlarged and sharply painful thyroid gland is red. The duration of the disease is 1.5-2 months.

For polyneuritis:

Polyneuritis is multiple lesions of peripheral nerves. Depending on the causes of the disease, infectious, allergic, toxic and other polyneuritis are distinguished. Polyneuritis is characterized by impaired motor and sensory function of peripheral nerves with predominant damage to the extremities. Infectious polyneuritis usually begins acutely, like an acute febrile process, with an increase in body temperature to 38-39°C and pain in the extremities. Body temperature lasts for several days, then returns to normal. To the fore in clinical picture weakness and damage to the muscles of the arms and legs, impaired pain sensitivity.

With allergic polyneuritis that develops after administration of the rabies vaccine (used to prevent rabies), an increase in body temperature may also be observed. Within 3-6 days after administration, high body temperature, uncontrollable vomiting, headache, and confusion may occur. There are constitutionally determined hypothalamopathies (“habitual fever”). This fever has a hereditary predisposition and is more common in women. young. Against the background of vegetative-vascular dystonia and constant low-grade fever, an increase in body temperature to 38-38.5°C is noted. A rise in temperature is associated with physical activity or emotional stress.

For artificial fever:

In the presence of prolonged fever, artificial fever should be considered. Some patients artificially induce an increase in body temperature in order to simulate a disease. Most often, this kind of disease occurs in young and middle-aged people, mainly females. They constantly find various diseases, are treated for a long time with various drugs. The impression that they have a serious illness is strengthened by the fact that these patients are often hospitalized, where they are diagnosed various diseases, therapy is carried out. When these patients are consulted by a psychotherapist, hysterical features (signs of hysteria) are revealed, which makes it possible to suspect that they have a falsified fever. The condition of such patients is usually satisfactory and they feel good. It is necessary to take the temperature in the presence of a doctor. Such patients must be carefully examined.

The diagnosis of “artificial fever” can be suspected only after observing the patient, examining him and excluding other causes and diseases that cause an increase in body temperature. Fever can occur with various acute surgical diseases(appendicitis, peritonitis, osteomyelitis, etc.) and is associated with the penetration of microbes and their toxins into the body. A significant increase in temperature in the postoperative period may be due to the body's reaction to surgical trauma.

When muscles and tissues are injured, the temperature may rise as a result of the breakdown of muscle proteins and the formation of autoantibodies. Mechanical irritation of thermoregulation centers (fracture of the base of the skull) is often accompanied by an increase in temperature. At intracranial hemorrhages(in newborns), post-encephalitic brain lesions also have a high temperature, mainly as a result of a central disturbance of thermoregulation.

For acute appendicitis:

For acute appendicitis typical sudden appearance pain, the intensity of which progresses as inflammatory changes develop in vermiform appendix. Weakness, malaise, nausea are also noted, and there may be stool retention. Body temperature is usually elevated to 37.2-37.6°C, sometimes accompanied by chills. With phlegmonous appendicitis, pain in the right iliac region is constant, intense, general state worsens, body temperature rises to 38-38.5°C.

When the appendiceal inflammatory seal suppurates, a periappendiceal abscess is formed. The condition of the patients is deteriorating. Body temperature becomes high and hectic. Sudden changes in temperature are accompanied by chills. Abdominal pain gets worse. A serious complication of acute appendicitis is diffuse purulent peritonitis. Abdominal pain is diffuse. The condition of the patients is serious. There is a significant increase in heart rate, and the pulse rate does not correspond to body temperature. Brain injuries can be open (with damage to the bones of the skull and brain matter) and closed. TO closed injuries include concussion, bruise and concussion with compression.

For a concussion:

The most common concussion occurs, the main clinical manifestations which are loss of consciousness, repeated vomiting and amnesia (loss of memory of events that preceded the disorder of consciousness). In the coming days after a concussion, there may be a slight increase in body temperature. Its duration may vary and depends on the severity of the condition. Headache, dizziness, weakness, malaise, and sweating are also observed.

With sunstroke and heatstroke, general overheating of the body is not necessary. Violation of thermoregulation occurs due to exposure to direct sun rays on an uncovered head or naked body. Weakness, dizziness, headache, nausea are a concern, and sometimes vomiting and diarrhea may occur. In severe cases, agitation, delirium, convulsions, and loss of consciousness are possible. As a rule, there is no high temperature.

Treatment of fever:

For hyperthermic (high temperature) syndrome, treatment is carried out in two directions: correction of the vital functions of the body and directly combating the high temperature. To reduce body temperature, both physical cooling methods and medications are used.

Physical means include methods that provide cooling of the body: it is recommended to remove clothes, wipe the skin with water, alcohol, 3% vinegar solution, or apply ice to the head. You can apply a bandage moistened to your wrists and head. cold water. Gastric lavage through a tube with cold water (temperature 4-5°C) is also used, and cleansing enemas are given, also with cool water. In the case of infusion therapy, all solutions are administered intravenously cooled to 4°C. The patient can be blown with a fan to reduce body temperature. These measures allow you to reduce body temperature by 1-2°C within 15-20 minutes. You should not lower your body temperature below 37.5°C, as after this it continues to decrease on its own.

As medications analgin is used, acetylsalicylic acid, Brufen. It is most effective to use the drug intramuscularly. So, use a 50% solution of analgin, 2.0 ml (for children - at a dose of 0.1 ml per year of life) in combination with antihistamines: 1% solution of diphenhydramine, 2.5% solution of pipolfen or 2 % solution of suprastin. To reduce body temperature and reduce anxiety, a 0.05% solution of chlorpromazine can be used orally. Children under 1 year old - 1 tsp., from 1 year to 5 years old - 1 tsp. l., 1-3 times a day. To prepare a 0.05% solution of chlorpromazine, take an ampoule of a 2.5% solution of chlorpromazine and dilute the 2 ml contained in it with 50 ml of water.

With more in serious condition to reduce the excitability of the central nervous system, lytic mixtures are used, which include aminazine in combination with antihistamines and novocaine (1 ml of a 2.5% solution of aminazine, 1 ml of a 2.5% solution of pipolfen, 0.5% - nal solution of novocaine). Single dose formula for children is 0.1-0.15 ml/kg body weight, intramuscularly.

To maintain adrenal function and lower blood pressure, corticosteroids are used - hydrocortisone (for children 3-5 mg per 1 kg of body weight) or prednisolone (1-2 mg per 1 kg of body weight). In the presence of respiratory disorders and heart failure, therapy should be aimed at eliminating these syndromes. When body temperature rises to high levels, children may develop convulsive syndrome, to stop which Seduxen is used (children under 1 year at a dose of 0.05-0.1 ml; 1-5 years - 0.15-0.5 ml of a 0.5% solution, intramuscularly).

To combat cerebral edema, use magnesium sulfate 25% solution in a dose of 1 ml per year of life intramuscularly. First aid for heat and sunstroke is as follows. It is necessary to immediately stop exposure to the factors that led to sunstroke or heatstroke. It is necessary to move the victim to a cool place, remove clothes, lay him down, and raise his head. Cool the body and head by applying compresses with cold water or dousing with cold water.

The victim is given a sniff ammonia, inside - soothing and cardiac drops (Zelenin drops, valerian, Corvalol). The patient is given plenty of cool fluids. If respiratory and cardiac activity stops, it is necessary to immediately release the upper Airways from vomit and start artificial respiration and cardiac massage until the first respiratory movements and cardiac activity appear (determined by pulse). The patient is urgently hospitalized in a hospital.

ASTRAKHAN STATE MEDICAL ACADEMY

DEPARTMENT OF THERAPY

Head department:

prof. PANOVA T. N.

Teacher

Ass. EREMENKO I. A

Prepared by: student 607 gr. l/f

Pesotsky A. S.

Astrakhan 2002

The term "fever" unknown origin"(FNG) denote situations that are often encountered in clinical practice, in which fever is the main or only sign of various diseases, the diagnosis of which remains unclear after a routine, and in some cases, additional examination. Sometimes fever syndrome of unknown origin is associated with drug effects and may be one of the manifestations of the so-called drug disease.

DRUG FEVERS

Fever accounts for 3–5% of adverse reactions to medications, and is often the only or main complication

Drug fevers can occur at various intervals (days, weeks) after the prescription of the drug and do not have any specific signs to distinguish them from fevers of other origins.

Drug fever begins midway between the 7th and 10th day of using the drug. Fever of a constant or remitting type, gradually increasing, is set at 39–40°C and continues until the drug that caused it is discontinued.

In the blood, as a rule, leukocytosis with a shift to the left (sometimes reaching 20-30 * 10 3 μl), eosinophilia is detected. When the body temperature rises, chills are often observed.

The diagnosis of drug fever is always difficult and at first can only be made tentatively. This fever begins gradually, with the patient’s condition being completely satisfactory. Later, when it is established at a level of 39-40C, the patient fails to note intoxication with adequate severity of fever and leukocytosis. Somewhat later, the fever is accompanied by other signs characteristic of the patient’s hypersensitivity to the drug: measles rash, purpura, urticaria. The development of more severe complications - arteritis with focal necrosis, exfoliative dermatitis, hemolytic anemia, thrombocytopenia and other reactions - is much less common.

Drug fever develops either as an allergic reaction or as a consequence of the direct toxic effect of a drug on an organ. The most striking example of drug fever in the first case is the development of systemic lupus erythematosus syndrome under the influence of hydrolasine. An example of drug fever in the second case is fever due to liver necrosis caused, for example, by monoamine oxidase inhibitors, halothane, and other hepatotoxic drugs.

For a long time, fever may be the main or even the only manifestation of the disease. To study its causes, it is necessary to re-examine the patient’s epidemiological history, his profession, the nature of his bad habits, and past illnesses. No less important is the result of a repeated objective examination of the patient using almost all modern techniques, including surgical ones.

Passive observation of the natural course of the disease for too long cannot be recommended as a standard strategy. A timely exploratory laparatomy may reveal, for example, a tumor that is still operable, while long-term observation will lead to a correct but belated decision.

The only sign of the medicinal nature of fever should be considered its disappearance after discontinuation of the suspected drug. Normalization of temperature does not always occur in the first days, but often several days after discontinuation, especially in cases of disturbances in drug metabolism, slow excretion of the drug, as well as in cases of kidney and liver damage. Repeated use of the medicine leads to a recurrence of fever. However, in most cases, if the high temperature persists for a week after discontinuation of the drug, the medicinal nature of the fever becomes unlikely.

Fever most often occurs when using the following groups of medications:

    antimicrobial drugs (penicillins, cephalosporins, tetracyclines, isoniazid, nitrofurans, sulfonamides, amphotericin B);

    cytostatic drugs (bleomycin, asparaginase, procarbazine);

    cardiovascular drugs (alphamethyldopa, quinidine, procainamide, hydralazine);

    drugs acting on the central nervous system (diphenylhydantoin, carbamazepine, chlorpromazine, haloperidol, thioridazine);

    anti-inflammatory drugs (aspirin, ibuprofen, tolmetin);

    various groups of drugs, including iodide, antihistamines, clofibrate, allopurinol, levamisole, metoclopramide, cimetidine, etc.

A. V. Vinogradov “Differential diagnosis of internal diseases” M. 1987.

At fever body temperature rises above thirty-seven degrees.

Causes of fever.

2. heatstroke

3. chronic diseases that have become acute

4. heart attack

5. thyrotoxicosis (thyroid disease)

6. poisoning or other diseases of the gastrointestinal tract

7. lymphoma and other forms of cancer

Symptoms of fever.

Chills, trembling, headache, increased sweating, aching bones and muscles, poor appetite, feeling thirsty, rapid breathing and pulse, possible delirium, redness of the face. Newborn babies are irritable, cry and do not latch on to the breast.

If your child has a fever, you should definitely consult a doctor. Children from six months to six years old may experience convulsions with fever. It is necessary to protect the child, remove all sharp and piercing objects to the side, and free the child’s breathing.

Sometimes with fever, convulsions, rash, abdominal pain, and stiffness of the neck muscles are noted.

If an increase in temperature is accompanied by pain in the joints, a rash in the form of blisters, or swelling, then consult a doctor immediately, because these may be symptoms of serious diseases.

If, during fever, there is a cough with the discharge of green or yellow sputum, pain in the head, ears, throat, stomach, dry mouth, thirst, confusion, rash, vomiting, then you should call a doctor immediately.

If a pregnant woman feels an increase in temperature, she should tell her obstetrician-gynecologist about it.

Treatment of fever.

What should a person with fever do?

Do not overexert yourself, observe bed rest, drink more ( warm milk and tea with herbs or raspberries), do not dress too warmly. You need to eat easily digestible food. If the body temperature is more than 380C, it is necessary to take an antipyretic drug. If you have severe pain in your bones and muscles, you can take a painkiller. For children with high temperatures, children's paracetamol in suspension is indicated. For children, the dose of an antipyretic drug is calculated depending on the child’s weight. It is contraindicated to give aspirin to children!!! Its use can lead to coma or death.

Doctor's actions in case of fever.

The doctor determines the cause of the fever. Depending on the cause, the optimal drug treatment is prescribed. If the disease is serious, he writes out a referral to a hospital.

Fever- increased body temperature, which occurs as a protective-adaptive reaction in infectious and many other diseases, or as a manifestation of thermoregulation disorders in pathologies of the nervous or endocrine system. It is accompanied by a violation of some body functions and is an additional burden on the respiratory and circulatory systems.

For fever the basal metabolism is increased, the breakdown of proteins increases (and therefore the excretion of nitrogen in the urine increases), the frequency of respiration and heart contractions increases; confusion of consciousness is possible. However, the dysfunctions and metabolism observed during fever are often determined not by the fever itself, but by the underlying disease.

Depending on the cause distinguish between infectious and non-infectious fever. The latter is observed in case of poisoning with various poisons (plant, animal, industrial, etc.), with idiosyncrasy, allergic reactions(for example, with parenteral protein administration) and diseases ( bronchial asthma), malignant tumors, aseptic inflammation, necrosis and autolysis. As a manifestation of disorders of body temperature regulation, non-infectious fever is observed in diseases of the brain, thyrotoxicosis, and ovarian dysfunction.

The mechanism of occurrence of infectious and non-infectious fever is similar. It consists of irritating the nerve centers of thermoregulation with substances (so-called pyrogens) of an exogenous nature (decomposition products of microbes, toxins) or formed in the body (immune complexes, pyrogens produced in leukocytes). There are three stages of the febrile reaction. The first stage - an increase in temperature - is the result of an increase in heat production with a decrease in heat transfer, which is caused by a reflex spasm of skin vessels. In this case, pale skin and chills are often noted. Then heat transfer begins to increase due to the dilation of blood vessels, and in the second stage of fever, when the temperature is kept at an elevated level (the height of the fever), both heat production and heat transfer are increased. Pale skin gives way to hyperemia (redness), skin temperature rises, and the patient experiences a feeling of heat. The third stage of fever - a decrease in temperature - occurs due to a further increase in heat transfer, incl. due to profuse sweating and significant additional vasodilation, which can lead to collapse. Such a course is often observed during a sharp, so-called critical, decrease in temperature, or crisis. If the decrease in temperature occurs gradually over many hours or several days (lytic decrease, or lysis), then the threat of collapse, as a rule, is absent.

For some diseases(eg malaria) fever is cyclical in nature: three stages of fever are repeated at certain intervals when the temperature remains normal. Based on the degree of increase in body temperature, subfebrile (from 37° to 38°), moderate (from 38° to 39°), high (from 39° to 41°) and excessive, or hyperpyretic, fever (over 41°) are distinguished.

In typical cases of acute infectious diseases, the most favorable form is moderate fever with daily temperature fluctuations within 1°.

Hyperpyrexia is dangerous due to profound disruption of vital functions, and the absence of fever indicates a decrease in the body's reactivity.

How to treat a fever?

You can take paracetamol and aspirin in moderate doses, as indicated in the instructions for these drugs, for no longer than 3 days in a row, with plenty of water.

Be careful with aspirin! It increases the risk of hemorrhages and bleeding with influenza.

If the temperature is high, then make an exception for medicinal plants that help reduce the temperature. Additionally, non-drug procedures can be performed:

1. You can bring down the temperature by rubbing the body with vodka or vinegar, half diluted with water. Undress during the procedure, and do not dress immediately afterwards. Rubbing should be done frequently, as water dries quickly on a hot body.

2. Don't dress too lightly and at the same time don't bundle up. In the first case, chills occur, and in the second, overheating. Wrapping up a feverish patient is like wrapping a blanket around a hot house.

3. Open a window in the room or use an air conditioner or fan. Cool air helps eliminate the heat emanating from your body.

4. High temperature causes thirst. The fact that you sweat and breathe rapidly contributes to the loss of fluid that needs to be replenished. To reduce the temperature, drink tea with raspberries, linden blossom and honey, cranberry or lingonberry juice. Recipes for diaphoretic tea are given below.

5. You can put a compress of vinegar water on your head. In this case, the heat will be tolerated much easier.

6. A good antipyretic. Mix the juice of 1 onion with the juice of 1 apple and 1 tablespoon of honey. Take 3 times daily.

According to the Medilexicon medical dictionary, fever: “a complex physiological response to illness mediated by pyrogenic cytokines and characterized by an increase in temperature, the generation of reagents acute phase and activation of the immune system."

The degree of fever is not necessarily related to the severity of the underlying condition. There are many over-the-counter medications available to reduce fever. However, sometimes it is better not to lower it. Fever can play an important role in helping the body fight a number of infectious diseases. Fever is seen as one of the body's immune mechanisms in an attempt to neutralize an internal threat (bacterial or viral).

WHAT ARE THE SIGNS AND SYMPTOMS OF FEVER?

Signs and symptoms may be noticed by others and detected by a doctor. Depending on the cause of the fever, symptoms may include:
  • Dehydration
  • General weakness
  • Headache
  • Inability to concentrate
  • Loss of appetite
  • Muscle pain
  • Sweating
  • Trembling, chills
High temperature 39.4 - 41.1 C can cause:
  • Disorientation
  • Convulsions
  • Hallucinations
  • Irritability

FEVER-INDUCED SEIZURES IN CHILDREN.

In some cases, children under 5 years of age have febrile convulsions or seizures caused by fever. They may appear if the child's temperature rises or falls sharply. Signs include convulsions and short-term loss consciousness. Although these attacks are alarming, they usually have no long-term consequences and are often caused by fever from common childhood illnesses.

FEVER IN NEWBORNS

Unexplained fever should be of great concern if it occurs in newborns. It is recommended to see a doctor when your child has a temperature of 38.3 C or higher or if:

  • Child under 3 months of age.
  • The child refuses to eat and drink.
  • Has a fever and unexplained irritability (unmotivated crying).
  • Has a fever and appears lethargic and unresponsive. In infants and children under 2 years of age, this may be a sign of meningitis (infection and inflammation of the lining of the brain).
  • When a newborn or child has a lower than normal temperature (less than 36.1 C). Very young children may have low temperature, rather than increased.

FEVER IN CHILDREN

Children usually tolerate fever well. Parents should check not only the change in temperature, but also how the child behaves. There is no cause for alarm if the child has a fever but is responsive to external stimuli, including changes in facial expressions and voices, drinking fluids, playing, responding to eye contact. Contact your doctor if your child:

  • He developed a fever after leaving the heated car. Seek medical help right away.
  • Fever has developed and persists for more than one day in children under 2 years of age. Or if the fever lasts longer than three days in children 2 years of age or older.
  • If your child is lethargic or irritable, if he vomits repeatedly, if he has a severe headache or stomach pain, or any other symptoms that cause serious discomfort.

Seek medical help if your child has problems immune system or chronic diseases.

Sometimes, children with severe neurological disorders, life-threatening bacterial infections in the blood (sepsis), or a suppressed immune system may have a lower than normal temperature.

FEVER IN ADULTS

Contact your doctor if:
  • Temperature above 39.4 C.
  • Fever lasts more than three days.
Also, call your doctor right away if your fever accompanies any of these signs or symptoms:
  • Abdominal pain or pain when urinating.
  • Difficulty breathing or chest pain.
  • Unusually severe lethargy or irritability.
  • Mental disorientation.
  • Continuous vomiting.
  • Strong headache.
  • Swelling of the throat.
  • Stiff neck and pain when bending the head forward.
  • Unusual sensitivity to bright light.
  • An unusual skin rash, especially if the rash spreads quickly.
  • Any other unexplained signs or symptoms.

WHAT ARE THE CAUSES OF FEVER?

Normal body temperature varies greatly, which must be taken into account when measuring it. Normal body temperature changes throughout the day according to the circadian rhythm. It is lower in the first half of the day and higher in the afternoon and evening. Normal temperature can be in the range of 36.1 C - 37.2 C. The temperature rises after eating, and it is also influenced by psychological factors. Other factors, such as the menstrual cycle or strenuous exercise, may also have an effect.

MECHANISM OF BODY TEMPERATURE.

  • Body temperature is set by the hypothalamus, an area at the base of the brain that acts as a thermostat for the entire system.
  • Temperature is the balance of heat produced in the body's tissues (especially the liver and muscles) and body heat lost.
  • During illness, the normal temperature may be slightly higher as the body moves blood away from the skin to reduce heat loss.
  • When a fever begins, the body tries to raise the temperature. There is a feeling of coldness and possible trembling. This is a mechanism to generate heat until the blood around the hypothalamus reaches a new level.
  • When the temperature begins to return to normal, you may sweat profusely as the body gets rid of excess heat.
  • In very old people, young people or alcoholics, the body's ability to generate a fever may be reduced.
Typically, fever is a consequence of the body's reaction to a viral or bacterial infection. Other possible reasons:
  • Some systemic diseases, such as rheumatoid arthritis, systemic lupus erythematosus.
  • Very strong tan.
  • Heatstroke.
  • In some cases, malignant tumors and some forms of kidney cancer.
  • Some vaccines: diphtheria, tetanus, and acellular pertussis (DTP) or pneumococcal vaccine (in infants and children).
  • Some medications.
Sometimes it is impossible to determine the cause of a fever. If the temperature is 38.3 C or higher for more than three weeks and no cause can be found, a diagnosis of fever of unknown origin is made after careful evaluation.

HOW IS FEVER DIAGNOSED?

Diagnosing a fever is simple - if the patient's body temperature is higher than usual, when he leads a sluggish lifestyle (does not run, just sits or lies), he has a fever. Depending on the signs and symptoms found during a physical examination and other tests, it can be determined whether an infection or something else is causing the fever.

Tests, such as blood tests, may be needed to confirm the diagnosis.

When small increase fever that persists for three weeks or more, but without other symptoms, various methods are used to determine the cause, such as blood tests and x-rays, etc.

HOW TO TREAT FEVER?

Treatment depends on the cause of the fever. Antibiotics will be prescribed for bacterial infections such as pneumonia or acute pharyngitis.
Antibiotics are not prescribed against viral infections, incl. with mononucleosis.

Drugs without a prescription
Over-the-counter medications such as acetaminophen (Tylenol, paracetamol) or ibuprofen (Advil, Motrin) are recommended. They are reducing elevated temperature. Adults can also take aspirin. But aspirin should not be given to children under 16 because it can cause a rare but potentially fatal disorder known as Reye's syndrome.

IS IT SMART TO SUPPRESS FEVER?

If the temperature rises slightly, it is not advisable to reduce it. This may prolong the disease or mask symptoms and thus make it difficult to identify its cause.

A number of experts argue that aggressive treatment fever disrupts the body's immune response. Viruses that cause colds and other respiratory infections thrive when normal temperature bodies. And just by slightly raising your body temperature, you can eliminate the virus.

WHAT ARE THE COMPLICATIONS OF FEVER?

A rapid rise or fall in temperature can cause fever-induced seizures (febrile seizures) in children 6 months to 5 years of age. Although they are alarming, the vast majority of febrile seizures do not lead to any long-term consequences.

Febrile seizures usually include loss of consciousness and trembling of all extremities. In rare cases, a child may have paralysis and convulse only part of the body.

What to do in case of febrile seizures?

Place baby on one side or stomach on the floor or ground. Remove everything sharp objects near the child, place something soft and hold the child to prevent injury. Do not put anything in your child's mouth or try to stop the seizure. Although most seizures resolve on their own, you should seek emergency medical attention. Some actions may be helpful during a fever:
  • You need to drink plenty of fluids: drinking water, fruit juices, as a fever can lead to fluid loss and dehydration. Oral rehydration solutions (for example, Regidron) can be used.
  • Rest is necessary for recovery. Activity can raise your body temperature.
  • Stay cool. Dress in light and comfortable clothing and keep room temperature cool.
  • Take paracetamol or ibuprofen. Use in accordance with the instructions and recommendations of a physician. High doses or long-term use of paracetamol can cause liver or kidney damage, and acute overdose can be fatal.
  • Don't drink alcohol.

TEMPERATURE MEASUREMENT.

Fever is present if:
  1. Temperature in the anus is 37.8 °C or higher.
  2. Temperature in the mouth is approximately 37.5 °C or higher.
  3. Temperature in the armpit is 37.2 °C or higher.
  4. Temperature in the ear is 37.2°C or higher.
To check the temperature, there are several types of thermometers, including electronic ones. Digital thermometers and those that quickly determine ear canal temperature are especially useful for young children and older adults. Glass thermometers containing mercury can potentially cause harmful consequences for people's health and environment, so they are not recommended.
  1. Place the thermometer in axillary area with arms crossed over chest
  2. Wait four to five minutes.
  3. Report the temperature to the doctor, but indicate where it was taken.

Using a rectal thermometer for babies:

  1. Lubricate the tip of the thermometer with Vaseline.
  2. Place the baby on his stomach.
  3. Carefully insert the thermometer.
  4. Hold the thermometer and baby for three minutes.
  5. Do not let go of the thermometer. If the child moves, the thermometer may deepen and cause injury.

HOW TO PREVENT FEVER?

It is necessary to reduce the likelihood of an infectious disease. The simplest and effective way is frequent washing hands, for adults and children. It is necessary to wash your hands frequently, especially before eating and after using the toilet, after being around people and interacting with animals. Children need to be shown how to wash their hands: lather the back of the hand and palm up to the wrist until foam forms, then rinse with running water. If there is no access to soap and water, wipe with a damp cloth or disinfectant, being careful not to touch the mucous membranes of the nose, mouth or eyes, which are the main route of transmission of viral infections. Prevention airborne droplets infections - frequent ventilation of premises. If possible, avoid contact with sick people.
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