's general knowledge of cause of disease of hepatitis A

's general knowledge of cause of disease of hepatitis A
Hepatitis A is a first type hepatitis virus (HAV) Infect more common intestinal infectious disease caused, hepatitis A sees more children and teenagers, it is generally 2- 6 weeks in incubation period, hepatitis A is divided into a acute jaundice type, too acute to have jaundice type, silt gallbladder type and serious disease type four types on clinic, the course of disease is 2-4 months. Festival that hepatitis A have illness coming on peak period will it be spring winter.
After the mankind is infected with hepatitis A and virus, proliferate in the digestive tract at first, in transient virus blood disease, the virus can continue proliferating in the blood leucocyte, then enter liver, duplicate, breed in the hepatocyte. 1- 2 week before getting up disease, hepatitis A virus right to maos of detailed bile duct from golgiosome of hepatocyte, and then enter people intestines through the bile duct, discharge from stool. It is that the virus excrete the peak in several days before first type hepatitis hides in latter stage and yellow subcutaneous ulcer and presents. In the patient of period, inferior clinical the infeted to have symptom, it is the most dangerous infection source. Hepatitis A and virus in the their excrement and urine, urine, vomit, if not well disinfecting, pollute the hands of surrounding environment, food, source of water or healthy people; In addition getting ill hand ' Such as cook in incubation period) And the fly with virus, can pollute the food, drinking water and apparatus. Once susceptible persons eat the food which contain hepatitis A and virus and not by the boiling or pollution drinking water and food boiled, or vegetables, strawberry, melon and fruit,etc. catching the edible excrement and urine and watering can suffer from first type hepatitis, cause and break out or distribute the infection.
The personal hygienic habit is bad, live crowdedly, populous, in the school, factory, countryside, nurseries and kindergartens organization or family with bad environmental sanitation, infection and high limitation of the first type hepatitis take place more easily to prevail; Once the pollution of waterhead can be caused and broken out popularly. 195O annual Sweden and our country in 1978 because the edible mud blood clam caused first type hepatitis to prevail, the edible wine preserved crab in Shanghai was caused and broken out in 1979, 1988 because Mao Han that edible hepatitis A and virus were polluted caused and broke out big, it is the excrement - embodiment that a route propagates. Report successively abroad, abuse medicines are injected and in the homosexual colony in recent years, virus antibody level and finding rate of hepatitis A are very high, the spread route of hepatitis A and virus, mainly through the anus - mouth or injection apparatus polluted among these crowds.
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