一、传染源。除人以外,猩猩、狨猴、恒河猴、短尾猴等在人工感染HAV后可以发病,并能从粪中查到病毒。但是,作为人类甲型肝炎的传染源主要是病人和无症状感染者,而灵长类实际意义不大,因为它们与人的接触机会极有限。病人一般在潜伏期末和临床症状出现后3周内,粪便中能查到病毒。 First, the source of infection. In addition to humans, orangutans, marmosets, rhesus monkeys, cynomolgus monkeys, etc., can develop disease after human infection with HAV and can detect the virus from the faeces. However, as the source of infection of human Hepatitis A, mainly patients and asymptomatic infections, and primates are of little practical significance because of their limited access to human beings. Patients usually found the virus in the stool within 3 weeks after the incubation period and the clinical symptoms appeared.