The main cause of viral hepatitis is the infection of liver tissue with hepatitis viruses. In total, nine types of the virus are known today: viruses of type A, B, C, D (delta), E, ??F, G, TTV or SAN. The most common are hepatitis A, B or C. The delta virus usually accompanies hepatitis B, weighting it. As an independent does not arise. Viruses of different groups differ significantly from each other, including the ways of infection. Group A, E, or F viruses are mainly transmitted from person to person by the fecal-oral route as intestinal infections. Such species are most often affected by children, pregnant women, people at a young age. After the transferred hepatitis to it the proof immunity is formed.

Group B, C and Delta viruses, as well as the rest, are transmitted parenterally, through blood and other biological fluids. Infection can occur with injections, blood transfusions, from mother to child, during surgery, sexual intercourse. These viruses affect people of any age.

Manifestations of viral hepatitis.

Acute viral hepatitis have the nature of cyclic diseases, consisting of certain stages, successively replacing each other. The incubation period lasts from the moment the virus enters the body to the first manifestations of the disease. For different types of the virus it is different - from several weeks to six months. The period of prodromal changes or the pre-dull period lasts from the moment of the first manifestations to the appearance of a typical jaundice clinic. It is characterized by fever, headaches, impaired well-being, chills and sweating, digestive disorders - decreased appetite, nausea with vomiting, stool disorders, bloating, abdominal pain of various locations.

There may be severe weakness and skin rashes, joint and muscle pains, respiratory manifestations, a tendency to bleeding and minor hemorrhages, an increase in the liver. By the end of the pre-zheltushnogo period there is a change in color stool and urine.

Symptoms of icteric period are most typical - there is a yellow staining of the skin and mucous membranes, jaundice spreads from the head down the body. Eye sclera, oral cavity are stained. Jaundice can grow for two to three days, then it lasts about a week at a stable level and begins to fade away. With hepatitis A or E, viruses are quickly removed from the body and there is no transition to chronic forms. But all other types of hepatitis tend to chronize the process. As jaundice occurs, the overall well-being of patients improves, the temperature decreases, nausea disappears, the general condition stabilizes. There is a discoloration of the color of urine and stools. Can disturb skin itching due to the presence of bile acids in the skin.

Post-jelly period begins with the moment of extinction of jaundice, normal state of health is restored, the liver decreases in size and ceases to be painful, the symptoms quickly disappear. Duration of changes in the analyzes may be continued, but gradually either a recovery occurs or a transition to a latent chronic form.

Perhaps the course of the disease as in a mild, subclinical form, without jaundice, and a severe pronounced course.

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