摘要
目的 调查淮河流域淮南段是否有毛毕吸虫尾蚴性皮炎的流行。方法 对淮南地区沿岸居民作现场调查和体检,了解尾蚴性皮炎的出现情况;现场采集耳萝卜螺,用直接压片法分离尾蚴,并用于感染实验室饲养的雏鸭,23d后解剖取成虫;将购自当地居民养殖的家鸭于实验室做病原学研究:用直接涂片法检查虫卵,水洗沉淀法收集虫卵,毛蚴孵化法分离毛蚴,并用所获毛蚴感染实验室养殖的耳萝卜螺,最后解剖家鸭收集成虫。结果 淮南地区从事农、渔业生产的居民,在接触疫水后出现皮炎,人群皮炎出现率为79.37%;自现场采集的耳萝卜螺体内可分离到有眼点的叉尾蚴,阳性率为1.09%;自购买家鸭的粪便内可查到虫卵,孵出的毛蚴感染实验室内养殖的耳萝卜螺,可获得与前述形态相同的有眼点的叉尾蚴;解剖自然感染和人工感染的家鸭,均可获得毛毕吸虫成虫。以上所获的虫卵、毛蚴、尾蚴和成虫经鉴定均为毛毕属吸虫各个生活期。结论 淮河流域淮南段有尾蚴性皮炎流行,其病原为毛毕属吸虫尾蚴。
Objective To investigate the prevalence of cercarial dermatitis of Trichobilharzia in Huainan section of Huaihe watershed. Methods Field investigation and medical examination among residents living along Huaihe River were carried out, so as to understand the infection status of cercarial dermatitis. Cercariae were separated from Radix auricularia collected by direct pressing , then laboratory-raised young ducks were infected with cercariae. The imagoes were collected by dissecting the ducks 23 days after infection. Etiological study in laboratory was performed using domesticated ducks bred by local residents. Eggs were checked by method of direct smear and were collected by sedimentation method. Miracidia were separated by hatching method and Radix auricularia bred in laboratory were infected with miracidia. The imagoes were collected by dissecting domesticated ducks at last. Results Residents who are engaged in agricultural production and fishery suffered from dermatitis after they touched and immersed in infestation water, and the infection rate was 79.37%. The cercariae with eye spot were found in Radix auricularia collected from Huainan area and its infection rate was 1.09%. The eggs could be checked from stool of domesticated ducks bought in the locality,the miracidia could be hatched from those eggs, which could infect Radix auricularia bred in laboratory, and then cercariae with eye spot and furcated tail could be collected with the same appearance as the above-mentioned cercariae. Adult worms could be obtained by naturally infected and artificially infected domesticated ducks. The above-mentioned eggs, miracidia, cercariae and adult worms were all identified as various life-phases of Tricho- bilharzia. Conclusion The endemic disease known as cercarial dermatitis of Trichobilharzia is in prevalence in Huainan section of Huaihe watershed, and its etiological agent is cercariae of Trichobilharzia.
出处
《国际医学寄生虫病杂志》
CAS
2007年第3期125-127,F0002,共4页
International JOurnal of Medical Parasitic Diseases
关键词
毛毕属吸虫
尾蚴性皮炎
淮河流域
Trichobilharzia
Cercarial dermatitis
Huaihe watershed