Abstract: Objective Objective To investigate the species and hosts of Paragonimus and its infection rate in eastern part of Zhenghe County，Fujian Province，so as to determine the local foci of Paragonimus. Methods Methods The snails，crabs and stools of wild cats were collected for the examinations of cercariae，metacercariae and eggs of Paragonimus. The geographical and environmental conditions of the areas were also investigated. Results Results A total of 4 890 Pseudobythinella jianouensis snails and 1 035 Semisul? cospira liberlina snails were examined，and the cercariae of Paragonimus were only found in P. jianouensis，with an infection rate of 0.10%（5/4 890） . Bottapotamon zhengheensis sp. nov. as the second intermediate host of P. skrjabini，were examined， and the infection rate was 85.29%（29/34）and the average numbers of metacercariae per crab and per gram of crab tissues were 3.85 and 0.62，respectively. Thirty?six Sinopotamun fujianensis crabs，as the second intermediate host of P. westermani，were examined，and the infection rate was 38.89%（14/36）and the average numbers of metacercariae per crab and per gram of crab tissues were 6.43 and 0.03，respectively. The eggs of Paragonimus were detected in 1 of 2 muck specimens of wild cats. Conclu Conclu? ? sion sion The data suggest that there is a focus of middle?to?high level of infection caused by P. westermani and P. skrjabini in the eastern part of Zhenghe County.

Key words: Paragonimiasis；Semisulcospira liberlina；Pseudobythinella jianouensis；Sinopotamun fujianensis；Botta? potamon zhengheensis sp. nov.；Epidemic focus；Zhenghe County

摘要： 目的 目的 对福建省政和县东部并殖吸虫虫种、 宿主种类及其感染率进行调查， 以确定当地并殖吸虫病疫源地。方 方 法 法 采集政和县当地淡水螺、 蟹及野猫粪便， 检查螺体内并殖吸虫尾蚴、 蟹体内囊蚴和野猫粪便中的虫卵。结果 结果 共检 查1 035只放逸短沟蜷和4 890只建瓯拟小豆螺； 仅在建瓯拟小豆螺体内发现并殖吸虫尾蚴， 其感染率为 0.10% （5/4 890）。检查政和博特溪蟹34只， 其中29只感染斯氏并殖吸虫囊蚴， 感染率为85.29%， 每只蟹及每克蟹组织平均囊 蚴数分别为3.85个和0.62个； 检查福建华溪蟹36只， 其中14只感染卫氏并殖吸虫囊蚴， 感染率为38.89%， 每只蟹及每克 蟹组织平均囊蚴数分别为6.43个和0.03个。2份野猫粪便中有1份检获并殖吸虫虫卵。结论 结论 福建省政和县东部存在 由斯氏并殖吸虫和卫氏并殖吸虫引发的中、 高度疫源地。

关键词: 并殖吸虫病； 放逸短沟蜷； 建瓯拟小豆螺； 福建华溪蟹； 政和博特溪蟹； 疫源地； 政和县