Faculty of Innovative Agriculture and Fishery Establishment Project, Prince of Songkla University, Surat Thani Campus, Surat Thani 84000, Thailand.
Department of Tropical Medicine and Parasitology, Seoul National University College of Medicine, Seoul 03080, Korea.
Parasites Hosts Dis. 2023 May;61(2):163-171. doi: 10.3347/PHD.23030. Epub 2023 May 23.
The present study aimed to determine the infection status of trematode metacercariae and adults in cyprinoid fish from the Khun Thale Swamp in Surat Thani, Southern Thailand, with epidemiologic and faunistic viewpoints. In 2020, 577 fish in 15 species were collected in the summer (February-April) and rainy (September-November) seasons. Fish were individually examined for trematode metacercariae in the whole body and adults in the gastrointestinal tract using a stereomicroscope. Three species of digenetic trematode metacercariae, i.e., Haplorchis taichui, Haplorchoides mehrai, and Centrocestus formosanus, were detected in the muscle, fin, and/or scale of fish. Two species of adult flukes, including Rohdella siamensis and Helostomatis cyprinorum, were collected in the intestines. The prevalence of overall trematode infections was 32.4% (187/577 fish), which was higher in the rainy season (41.4%; 118/285) than in the summer season (23.6%; 69/292). The metacercariae of H. taichui and H. mehrai were detected in 7 fish species each, and those of C. formosanus were found only in Rasbora toneri. The aspidogastrean trematode R. siamensis (adult) was detected in Babonymus gonionotus. A digenean species, H. cyprinorum (adult), was found in Labiobarbus siamensis and Osteochilus vittatus. The present study has first confirmed that the metacercariae of heterophyid flukes, including H. taichui, H. mehrai, and C. formosanus, and adults of R. siamensis (Aspidogastrea) and H. cyprinorum (Digenea) are infected in some species of the cyprinoid fish from the Khun Thale Swamp in Surat Thani, Thailand.
本研究旨在从泰国南部素叻他尼府坤他拉叻沼泽地的鲤科鱼类中，从流行病学和动物区系学的角度确定吸虫囊蚴和成虫的感染状况。2020 年，在夏季（2 月至 4 月）和雨季（9 月至 11 月）采集了 15 种 577 条鱼。使用立体显微镜对鱼的整个身体和胃肠道中的吸虫囊蚴和成虫进行个体检查。在鱼的肌肉、鳍和/或鳞片中发现了 3 种双腔吸虫囊蚴，即中华支睾吸虫、湄公后睾吸虫和台湾血属吸虫。在肠道中采集到两种成年吸虫，包括罗氏吸虫和圆口铜鱼。总吸虫感染的流行率为 32.4%（577 条鱼中有 187 条），雨季（41.4%；285 条中有 118 条）高于夏季（23.6%；292 条中有 69 条）。中华支睾吸虫和湄公后睾吸虫的囊蚴在 7 种鱼类中均有发现，而台湾血属吸虫的囊蚴仅在 Rasbora toneri 中发现。Aspidogastrea 吸虫罗氏吸虫（成虫）在 Babonymus gonionotus 中被发现。一种吸虫，即圆口铜鱼（成虫）在 Labiobarbus siamensis 和 Osteochilus vittatus 中被发现。本研究首次证实，在泰国素叻他尼府坤他拉叻沼泽地的鲤科鱼类的一些物种中，感染了异形吸虫的囊蚴，包括中华支睾吸虫、湄公后睾吸虫和台湾血属吸虫，以及罗氏吸虫（Aspidogastrea）和圆口铜鱼（Digenea）的成虫。
