Chontananarth Thapana, Wongsawad Chalobol
Applied Parasitology Research Laboratory, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50202, Thailand.
Asian Pac J Trop Biomed. 2013 Mar;3(3):237-43. doi: 10.1016/S2221-1691(13)60058-1.
To investigate the epidemiological situation of cercarial trematodes infection in freshwater snails from different water resources in Chiang Mai province, Thailand.
The snail specimens were collected from 13 districts of Chiang Mai province during April 2008 to February 2012. The prevalence of cercarial infection in snails was investigated using the crushing method. The drawing was done with the help of a camera lucida for the morphological study.
A total of 2 479 snail individuals were collected and classified into 7 families, 11 genera, and 14 species, Among them, 8 snails species were found to be infected with an overall prevalence of 17.27% (428/2 479), which infected with nine groups of cercariae; gymnocephalous cercaria, strigea cercaria, megalurous cercaria, monostome cercaria, parapleurolophocercous cercaria (Haplorchis cercaria), pleurolophocercous cercaria, furcocercous cercaria (Transversotrema cercaria), xiphidiocercaria, and virgulate cercaria. The parapleurolophocercous cercaria was found to be the dominant type among the cercarial infection in the snails (64.25%).
The various species of snails found in the research location act as the intermediate hosts for the high prevalence of parasitic infection of many species of mammals. This work will provide new information on both the distribution and first intermediate host of trematodes.
调查泰国清迈省不同水源淡水螺中尾蚴吸虫感染的流行病学情况。
于2008年4月至2012年2月期间从清迈省13个区收集螺标本。采用压碎法调查螺中尾蚴感染率。借助绘图仪进行绘图以进行形态学研究。
共收集到2479只螺个体，分为7科、11属、14种，其中8种螺被发现感染，总体感染率为17.27%（428/2479），感染了9组尾蚴；裸头尾蚴、斜睾尾蚴、巨尾尾蚴、单口尾蚴、副侧尾尾蚴（哈氏尾蚴）、侧尾尾蚴、叉尾尾蚴（横川尾蚴）、剑尾尾蚴和细尾尾蚴。副侧尾尾蚴被发现是螺中尾蚴感染中的优势类型（64.25%）。
研究地点发现的各种螺类作为中间宿主，导致多种哺乳动物寄生虫感染率较高。这项工作将为吸虫的分布和第一中间宿主提供新的信息。
