Pal P K, Haldar A, Bhattacharya S K
Department of Community Medicine, Medical College Calcutta.
J Commun Dis. 1994 Jun;26(2):88-91.
In a housing complex of North Calcutta, a sudden outbreak of hepatitis occurred between September 1988 and January 1989. Of 620 residents, 8.5 per cent were affected. Majority of the cases occurred among the adult population and the case fatality rate was 3.8 per cent. The epidemic was common source with peak incidence in the month of November. The source of infection was most likely drinking water supplied by the Municipal Corporation which was found to be contaminated by faecal coli. Epidemic was suspected to be caused by enterically transmitted Non A Non B hepatitis virus as the serological testing of all 18 blood samples were negative for anti-HAVIgM titre and only one sample was positive for HBsAg.
1988年9月至1989年1月期间，加尔各答北部的一个住宅小区突然爆发了肝炎疫情。在620名居民中，8.5%受到了感染。大多数病例发生在成年人中，病死率为3.8%。此次疫情为共同来源传播，11月份发病率达到峰值。感染源很可能是市政公司供应的饮用水，检测发现该饮用水被粪大肠菌污染。由于对所有18份血样进行的血清学检测中抗甲型肝炎病毒免疫球蛋白M（anti-HAVIgM）滴度均为阴性，且只有一份样本乙型肝炎表面抗原（HBsAg）呈阳性，因此怀疑此次疫情是由肠道传播的非甲非乙型肝炎病毒引起的。
