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本文报道了鄱阳湖区6个轻、中、重疫区村化疗后人群血吸虫再感染的纵向观察结果。结果显示：疫区流行程度越严重，再感染水平越高。在以化疗为主的重疫区村，再感染率有年间波动，但均维持在30％以上水平。在已进行环境改造的重疫区村，化疗后再感染率呈逐年下降趋势。重疫区各年龄组均可见再感染，高峰在10－24岁年龄组。轻、中度疫区再感染也多发生在低年龄组。各疫村男女间再感染率无显著性差异。
This paper reports the longitudinal observation of reinfection of Schistosoma japonicum in 6 villages in Poyang Lake area after chemotherapy. The results showed that the more severe the epidemic area was, the higher the level of re-infection. In the heavily infested area where chemotherapy is predominated, the rate of re-infection fluctuated over the years, but both remained above 30%. In the heavily polluted area where the environment has been rebuilt, the infection rate after chemotherapy has been declining year by year. Re-infection in all age groups were observed in the epidemic-affected areas, and the peak was in the 10-24 age group. Light and moderate epidemic re-infection also occurred in the lower age group. There was no significant difference in re-infection rates between men and women in each affected village.