我校3个学生食堂于1996年12月5日至1997年1月25日相继发生甲型肝炎(甲肝)暴发。就餐者共2400名,其中男1800名,女600名,共发病42例(男32例,女10例),占就餐人数的1.7%左右,发病年龄最小18岁,最大25岁。首发病人为一女生,20岁,因疲乏无力、纳差、发热、肝区疼痛、恶心、呕吐来门诊就医。体检皮肤黄染,谷丙转氨酶增高,抗-HAV IgM阳性,尿胆红素 Three students in our school cafeteria from December 5, 1996 to January 25, 1997 have occurred in hepatitis A (hepatitis A) outbreaks. A total of 2,400 diners, including 1800 men and 600 women, a total of 42 cases (32 males and 10 females), accounting for about 1.7% of the number of meals, the youngest 18 years of age, maximum 25 years old. The first patient is a girl, 20 years old, due to fatigue, anorexia, fever, liver pain, nausea, vomiting to the clinic. Physical examination of skin yellow dye, alanine aminotransferase increased, anti-HAV IgM positive, urine bilirubin