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首页> 外文期刊>Journal of Parasitology >Discovery of Opisthorchis lobatus (Trematoda: Opisthorchiidae): a new record of small liver flukes in the Greater Mekong Sub-region.
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Discovery of Opisthorchis lobatus (Trematoda: Opisthorchiidae): a new record of small liver flukes in the Greater Mekong Sub-region.

机译：发现 Opisthorchis lobatus （Trematoda：Opisthorchiidae）：大湄公河次区域小肝吸虫的新记录。

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摘要

Metacercariae, morphologically similar to those of small liver flukes, were found to parasitize red-tailed snakehead fish, Channa limbata, collected from the city of Vientiane, Lao People's Democratic Republic. Adult worms that were recovered from experimentally-infected hamsters showed characteristics distinctly different from Opisthorchis viverrini, but closely similar to Opisthorchis lobatus, which was first reported in poultry (Anas sp.) from Pakistan. The present study aimed to redescribe O. lobatus based on the adult worms recovered from experimentally-infected hamsters. Additionally, it aimed to document the genetic relationships among O. lobatus and other opisthorchiid liver flukes using the mitochondrial cytochrome c oxidase subunit 1 (COI) gene and the internal transcribed spacer 2 (ITS2) region. DNA alignment of the O. lobatus and O. viverrini COI partial sequences (330 bp) showed 3.03% fixed differences (2.72% of amino acids changed) while the ITS2 region (350 bp) indicated a 0.86% difference for nucleotides. Species boundaries between the 2 parasites were determined by neighbor-joining analysis using the molecular sequence data. The phenogram confirmed that O. lobatus was distinctly different from O. viverrini, representing the first reported instance of O. lobatus in the Greater Mekong Sub-region (GMS) and the first record of C. limbata as the second intermediate host of a small liver fluke. Questions regarding human infection and the extent of the geographic distribution of these species should be investigated further.
机译：发现在形态上类似于小肝吸虫的尾to虫寄生于从老挝人民民主共和国万象市采集的红尾snake鱼（Channa limbata ）。从经实验感染的仓鼠中回收的成虫具有与 Opisthorchis viverrini 明显不同的特征，但与 Opisthorchis lobatus 极为相似，后者最早在家禽中报道（ Anas sp。）。本研究旨在重新描述 O。 lobatus 是基于从实验感染的仓鼠中回收的成虫。另外，它旨在证明之间的遗传关系。使用线粒体细胞色素 c 氧化酶亚基1（COI）基因和内部转录间隔区2（ITS2）区域，使lobatus 和其他阿片类鱼肝片吸虫。 O的DNA比对。 lobatus 和 O。 viverrini COI部分序列（330 bp）显示出3.03％的固定差异（2.72％的氨基酸发生了变化），而ITS2区域（350 bp）则显示了0.86％的核苷酸差异。通过使用分子序列数据的相邻连接分析确定了2种寄生虫之间的物种边界。物线图确认为 O。 lobatus 与 O明显不同。 viverrini ，代表 O的第一个报告实例。大湄公河次区域（GMS）的lobatus 和 C的第一记录。肢体是小肝吸虫的第二中间宿主。有关人类感染以及这些物种地理分布范围的问题应进一步调查。

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