安徽省长江流域人体寄生吸虫的分布现状

本文报告安徽省长江流域血吸虫病流行村的40个点计16286人和7个人体寄生虫分布调查中签县的34个点共17611人的人体寄生吸虫调查结果。在未控制流行地区,日本血吸虫病的居民粪检阳性率仍高达8.6％,急性感染病例近年明显增多,1989年达4664例,表明血吸虫感染仍是该地区的严重社会公共卫生问题。调查中同时发现了7种其它人体寄生吸虫,居民总感染率为1.2％,其中华支睾吸虫和姜片虫是散在分布。繁昌县为肺内寄生卫氏并殖吸虫流行区,而旌德等其它地区为肺外寄生型肺吸虫感染。棘口科和异形科吸虫系本省首次报告,繁昌县11例虫卵阳性者经驱虫鉴定为抱茎棘隙吸虫(Echinochasmus perfoliatus),另3例驱虫鉴定为横川后殖吸虫(Metagonimus yokogawai)。旌德县1例巨片形吸虫感染者驱出虫体。

DISTRIBUTION OF HUMAN TREMATODE IN THE YANGTSE VALLEY IN ANHUI PROVINCE

The paper reports the distribution of human trematodes in the Yangtse Valley in Anhui Province investigated during 1986-1989. Altogether 16 286 inhabitants from 40 spots of the endemic area of schistosomiasis and 17611 persons from 34 sites of 7 randomly selected counties for human parasite survey were under study. The results revealed that the positive rate of schistosomiasis in endemic area by stool hatching remained as high as 8.6%, and the cases of acute infection increased to 4664 in 1989, indicating that schistosomiasis is still a major challenge in these regions. There are other 7 species of trematodes found in this area, namely, Clonorchis sinensis, Fasio-lopsis buski, Paragonimus westermani (both intra-and extra-pulmonary types),Echino-chasmus perfoliatus, Heterophyidae, Metagonimus yokogawai, and Fasiola gigantica, the overall infection rate being 1.2%. Among these species, Echinostomatide and Heterophyidae were recorded for the first time in Anhui province. In order to differentiate the species of trematodes which were difficult to identify based on egg examination alone, 11 cases of Echinochasmus perfoliatus, 3 cases of M. yokogawai and one case of Fasciola gigantica infection were confirmed by detecting adult worms following specific anthelmintic treatment.