景洪地区肺吸虫的第二中间宿主调查

Investigation on second Intermediate Host of Lung Fluke in Jinghong Region

景洪地区肺吸虫的第二中间宿主为景洪溪蟹和毛足溪蟹。两者的自然感染率分别为68.3%及55.6%,平均每只蟹含11.3及2.6个囊蚴。雌雄性别之间的自然感染率无差别,但不同地点蟹的感染度不同。同一只蟹被三种肺吸虫囊蚴混合感染者占5.8%。70%左右的小睾肺吸虫囊蚴及丰富肺吸虫囊蚴寄生在两种溪蟹的头胸部。

The second intermediate hosts of lung fluke in the jinghong region are Potamon chinghungense and P.hispidum.Their natural infection rates are 68.3% and 55.6% respectively and on the average,each crab contains 11.3 and 2.6 metacerc- ariae.There is no difference between male and female in the natural infection rate, but the infectiosity is different in different places.5.8% of the crabs are infected by three sp(?)cies of metacercariae simultaneously.About 70% metacercariae of Par- ogonimus microrchis or P.proliferus are parasitized in the cephalothorax of P.chinghungense or P.hispidum.