粤北南雄市珠玑镇三平正并殖吸虫高度疫源地调查

目的了解南雄市珠玑镇并殖吸虫流行分布状况。方法调查点山溪采集螺蛳、溪蟹，按常规方法进行解剖，检查并殖吸虫尾蚴、囊蚴．鉴定并殖吸虫虫种。解剖粪便虫卵检查阳性之猫、犬，查找并殖吸虫成虫，制成染色标本比较。结果解剖132只蟹，检出感染三平正并殖吸虫囊蚴蟹97只，蟹鉴定为平和华溪蟹。阳性率73．48％（97／132）。感染度：7.43个囊蚴／只蟹，0．31个囊蚴／g蟹。感染指数1．70。猫、犬粪便检出并殖吸虫卵阳性率25．00％（6／24）。解剖虫卵检查阳性猫、犬，检获三平正并殖吸虫成虫16条。结论首次发现南雄市珠玑镇为三平正并殖吸虫高度疫源地（Ⅱ级）。第二中间宿主为平和华溪蟹。保虫宿主有描、犬。

Investigation on the highly infectious focus of Euparagonimus cenocopiosus at Zhuji town, Nanxiong city of north Guangdong province

To investigate the popularity and distribution of Euparagonimus cenocopiosus at Zhuji town, Nanxiong city of north Guangdong province, snails and crabs in the mountain creek at the investigation area were collected. The cercaria and metacercariae of Paragonimus were anatomized by conventional methods, and their categories were identified. Meanwhile, the stool egg positive cats and dogs were anatomized and the adult worm and eggs of Paragonimus were detected. The staining preparations were prepared and used for comparison. Consequently, 97 out of 132 anatomized crabs were found to be infected with metacercariae of E. cenocopiosus, and the crab species was identified as Sinopotamon pinheense. The positive detection rate of Paragonimus was 73.48% （97/132） and the intensity of infection was 7.43 metacercariae per crab and 0.31 metacercariae per gram of crab, with an infection index of 1.70. The positive rate of adult Paragonirnus detected in the excrement of cats and dogs was 25.00% （6/24）. All together, 16 adult E. cenocopiosus were detected in the stool egg-positive cats and dogs a natomized. Our observation indicates that Zhuji town, Nanxiong city of north Guangdong province is proved to be a highly in- fectious focus of E. cenocopiosus and it is the first discovery so far. Its second intermediate host of Paragonimus is Sinopotamon pinheense crab and the reservoir hosts are cats and dogs.