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1978年11月至1979年4月在印度Baramulla农村地区发生了一次水源性病毒性肝炎流行。当地居民16,620人,其中275人(1.65%)发病。年龄多为11～40岁,男性与女性之比为1∶0.8。饮用Ningli Nallah河水的12,900名居民有269人(2.83%)发病;饮用水来自另一供水系统的3,720名居民则只有6人(0.16%)发病。Ningli Nallah河水经7次取样检查均证明遭粪便严重污染。有6个村庄的155例中大多数在7周内发病,表明此次流行系因饮用同一水源引起。另方面,1户先后发生2例的共18户,1户发生3例的2户,且流行高峰过后仍有续发病例出现,表明此次流行还具有接触传播的特征。128名接触者中有39人(27.3%)
A waterborne viral hepatitis epidemic occurred in rural Baramulla, India, from November 1978 to April 1979. There were 16,620 local residents, of whom 275 (1.65%) were affected. Mostly age 11 to 40 years old, male to female ratio of 1:0.8. 269 (2.83%) of the 12,900 inhabitants of the Ningli Nallah river were eaten; only 6 (0.16%) of the 3,720 inhabitants who came from another water supply were affected. The Ningli Nallah river water was found to have been seriously contaminated with manure after 7 sampling inspections. Most of the 155 cases in 6 villages developed disease within 7 weeks, indicating that the epidemic was caused by drinking the same source of water. On the other hand, there were 18 households with one case in two cases and two cases with one case with three cases in one household. After the peak of the epidemic, there were still cases of recurrence, indicating that the epidemic was also characterized by contact and transmission. Of the 128 contacts, 39 (27.3%)