The main way of hepatitis “A” transmitting is fecal-oral. This virus is transmitted through water rarely, only in case if water was polluted by sewer drains or it not properly processed. The virus of hepatitis is able to be transmitted at close physical contact, but at casual communication with the patient the virus is not transmitted.
Hepatitis “A” has an incubation period which lasts till 28 days. Manifestations of the disease can be rather mild, but sometimes can take a severe form. In the second case there is malaise, vomiting, stool disorder, temperature rises, appetite vanishes; there is an unpleasant feeling in subcostal area, urine becomes dark, there is a yellowness of skin and eye whites but such symptoms appear not in each patient.
Symptoms of the disease declare themselves more in adults than in children, and probabilities of hepatitis development in the most serious form with possible lethal outcome people of advanced age are subjected most of all.
Each person who has not been vaccinated against hepatitis “A” and had never had this disease is not insured from becoming infected. Nevertheless, most often children fell ill. The main factors preceding infection are following:
• Bad sanitary condition;
• Crude water;
• Use of injection drugs;
• Accommodation together with hepatitis diseased person;
• Visiting the districts where there are frequent epidemics of the virus previously without having carried out vaccination.