Ardpairin Jiranun, Dumidae Abdulhakam, Subkrasae Chanakan, Nateeworanart Saengchai, Thanwisai Aunchalee, Vitta Apichat
Department of Microbiology and Parasitology, Faculty of Medical Sciences, Naresuan University, Phitsanulok, Thailand.
Department of Medical Technology, Faculty of Allied Health Sciences, Naresuan University, Phitsanulok, Thailand.
Iran J Parasitol. 2022 Apr-Jun;17(2):268-276. doi: 10.18502/ijpa.v17i2.9545.
Freshwater snails serve as intermediate hosts for a variety of trematodes that cause illness in the human and animal populations. Several species of freshwater snails in Thailand have been found to have larval trematode infections. We aimed to investigate a freshwater snail in Phitsanulok Province and report on its current status of larval trematode infection.
Freshwater snails were collected from six localities (rice field and irrigation canal) by handpicking and using a count per unit of time sampling approach. The snails were identified by their external shell morphology. The shedding method was applied to observe the cercariae, which were photographed under a light microscope to determine their morphological types.
A total of 211 snails were classified into seven genera. The most abundant snail species was sp., representing 31.3% of the sample, followed by sp., sp., , , , and , in that order. From the sample, 21 snails (9.95%), including sp., sp., and , were infected with cercarial trematodes, which could be categorized into four types, namely amphistome, parapleurolophocercous, echinostome, and xiphidiocercaria. Amphistome emerged from sp., and was the most common cercaria to be recovered, representing 80.9% of all infected snails.
This study presents the current prevalence of cercariae in infected snails within the studied area. It is important to manage intermediate host snails in order to restrict trematode life cycle completion.
淡水螺是多种吸虫的中间宿主，这些吸虫会导致人类和动物患病。泰国已发现几种淡水螺感染了吸虫幼虫。我们旨在调查彭世洛府的一种淡水螺，并报告其吸虫幼虫感染的现状。
通过手工挑选和单位时间计数采样法，从六个地点（稻田和灌溉渠）收集淡水螺。根据其外壳形态对螺进行鉴定。采用逸出法观察尾蚴，在光学显微镜下拍照以确定其形态类型。
共将211只螺分为7个属。数量最多的螺种是 属的螺，占样本的31.3%，其次依次是 属的螺、 属的螺、 属的螺、 属的螺、 属的螺和 属的螺。在样本中，21只螺（9.95%）感染了尾蚴吸虫，包括 属的螺、 属的螺和 属的螺，可分为四种类型，即双口吸虫、副侧尾蚴、棘口吸虫和剑尾蚴。双口吸虫从 属的螺中逸出， 是最常见的尾蚴，占所有感染螺的80.9%。
本研究呈现了研究区域内感染螺中尾蚴的当前流行情况。管理中间宿主螺以限制吸虫生命周期的完成非常重要。
