目的：了解黄山市肺吸虫第二中间宿主—溪蟹感染情况，为全市防控肺吸虫病提供科学依据。方法根据水系分布特点和以往调查情况确定调查点，在调查点内根据当地环境，选择调查溪流，采用人工和地笼捕捉境内溪流中的溪蟹，实验室解剖镜下检查肺吸虫囊蚴。计算溪蟹的感染率及囊蚴感染指数。结果调查了11个乡镇的12个行政村，捕捉溪蟹275只，检出阳性溪蟹57只，阳性率20.73%。感染度平均每只蟹3.51个，感染性溪蟹每克含囊蚴数0.958个，蟹囊蚴感染指数为0.19406。随着溪蟹体重的增加，阳性率和感染度随之增高( r阳性率=0.905，P<0.02；r感染度=0.929，P<0.01)。雄性溪蟹的阳性率和感染度均高于雌性溪蟹（χ2=136.53，P<0.01）。不同水系溪蟹阳性率差异有统计学意义（χ2=7.70，P<0.05）。结论调查结果表明黄山市仍存在着较高的肺吸虫病流行因素。新安江水系流域是今后肺吸虫病防治的重点区域。%Objective To investigate the infection status of Potamon denticulate, the second intermediate host of Paragonimus in Huangshan area in order to provide scientific basis for prevention and control of paragon⁃imiasis. Methods The survey sites were initially anchored according to the distribution nature of local water system and previous findings as well as local environment. Appropriate streams were selected, and the crabs were manually captured or harvested with a cage. The metacercariae of lung fluke were isolated in the lab un⁃der anatomical lens, and the infection rate of crabs and the infection index of metacercaria were calculated. Re⁃sults A total of 275 crabs were obtained in 12 administrative villages of 11 towns, and 57 were found infested with the Paragonimus(positive rate: 20.73%). The infectiosity was 3.51/per crab, and the metacercaria was counted as 0.958 in pergram of the infected crab. The infection index of metacercaria was 0.194 06. The preva⁃lence and infectiosity were positively correlated with the weight of crab (r= 0.905, P<0.02;r=0.929, P<0.01). The positive incidence and the infectiosity were higher in male crabs than in the female ones(χ 2=136.53, P<0.01), and the difference was significant for the positive incidence of crabs living in dissimilar rivers(χ 2=7.70, P<0.05). Conclusion Our findings suggest that paragonimiasis is still endemic risks in Huangshan area, and Xin'an river basin shall be the focus of following paragonimiasis control.
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