来自巴勒斯坦淡水水体的前凹螺（Melanopsis praemorsa）中复殖吸虫的幼虫阶段。
Larval stages of digenetic trematodes in Melanopsis praemorsa snails from freshwater bodies in Palestine.
作者信息
Bdir Sami, Adwan Ghaleb
机构信息
Department of Biology and Biotechnology, An-Najah N. University, P. O. Box (7)-Nablus, Palestine.
出版信息
Asian Pac J Trop Biomed. 2011 Jun;1(3):200-4. doi: 10.1016/S2221-1691(11)60027-0.
OBJECTIVE
To detect the species of larval trematodes (cercariae) in Melanopsis praemorsa snails from 5 different fresh water bodies in Palestine.
METHODS
A total of 1 880 Melanopsis praemorsa snails were collected from different fresh water bodies in Palestine from October, 2008 to November, 2010. Cercariae in Melanopsis praemorsa snails were obtained by lighting and crushing methods. The behavior of cercariae was observed using a dissecting microscope.
RESULTS
Three different species of larval trematodes were identified from Melanopsis praemorsa snails collected only from Al-Bathan fresh water body, while snails from other water bodies were not infected. These species were microcercous cercaria, xiphidiocercaria and brevifurcate lophocercous cercaria. These cercariae called Cercaria melanopsi palestinia I, Cercaria melanopsi palestinia II and Cercaria melanopsi palestinia III have not been described before from this snail in Palestine. The infection rate of Melanopsis praemorsa collected from Al-Bathan fresh water body was 5.7%, while the overall infection rate of snails collected from all fresh water bodies was 4.3%. Details are presented on the morphology and behavior of the cercariae as well as their development within the snail.
CONCLUSIONS
These results have been recorded for the first time and these cercariae may be of medical and veterinary importance.
目的
检测巴勒斯坦5个不同水体中黑螺（Melanopsis praemorsa）体内的吸虫幼虫（尾蚴）种类。
方法
2008年10月至2010年11月期间，从巴勒斯坦不同水体中总共收集了1880只黑螺。通过光照和压碎法获取黑螺体内的尾蚴。使用解剖显微镜观察尾蚴的行为。
结果
仅从阿尔 - 巴坦淡水水体收集的黑螺中鉴定出三种不同种类的吸虫幼虫，而其他水体的螺未被感染。这些种类为微尾蚴、剑尾蚴和短叉叶尾蚴。这些尾蚴被称为巴勒斯坦黑螺尾蚴I、巴勒斯坦黑螺尾蚴II和巴勒斯坦黑螺尾蚴III，此前在巴勒斯坦的这种螺中未曾有过描述。从阿尔 - 巴坦淡水水体收集的黑螺感染率为5.7%，而从所有淡水水体收集的螺的总体感染率为4.3%。文中详细介绍了尾蚴的形态、行为以及它们在螺体内的发育情况。
结论
这些结果首次被记录，这些尾蚴可能具有医学和兽医学重要性。
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