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首页> 外文期刊>Journal of Parasitology >CHARACTERIZATION OF THE LIFE CYCLE OF A FISH EYE FLUKE, AUSTRODIPLOSTOMUM OSTROWSKIAE (DIGENEA: DIPLOSTOMIDAE), WITH NOTES ON TWO OTHER DIPLOSTOMIDS INFECTING BIOMPHALARIA HAVANENSIS (MOLLUSCA: PLANORBIDAE) FROM CATFISH AQUACULTURE PONDS IN MISSISSIPPI, USA
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CHARACTERIZATION OF THE LIFE CYCLE OF A FISH EYE FLUKE, AUSTRODIPLOSTOMUM OSTROWSKIAE (DIGENEA: DIPLOSTOMIDAE), WITH NOTES ON TWO OTHER DIPLOSTOMIDS INFECTING BIOMPHALARIA HAVANENSIS (MOLLUSCA: PLANORBIDAE) FROM CATFISH AQUACULTURE PONDS IN MISSISSIPPI, USA

机译：表征鱼眼F的生命周期，洋龙虾（DIGENOSTEA：双生龙虾），并注意到另外两种影响食蟹鳞茎的哈瓦那双歧杆菌（MOLLUSCA：PLANDOBIDAE），来自英国的食性水生动物。

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摘要

Ocular diplostomiasis is caused by trematode species in the family Diplostomidae, specifically those in the genera Austrodiplostomum, Diplostomum, and Tylodelphys. Diplostomid trematodes are globally distributed parasites of fish. Heavy infections of diplostomids that parasitize the eyes of fish can result in acute mortality while chronic infections are often characterized by impaired vision or blindness. In the southeastern United States, commercial catfish production is threatened by piscivorous birds and the many trematode species that parasitize them. The life cycles typically involve a piscivorous avian definitive host, a mollusk first intermediate host, and a fish second intermediate host. A survey of parasites infecting the snail host Biomphalaria havanensis (= B. obstructa) in catfish production ponds was undertaken. Snails were collected from 2 separate ponds during the summer of 2014 and observed for the release of trematode cercariae. A total of 1,740 snails were collected. Three distinct longifurcate pharyngeate cercariae were observed and these cercariae were characterized morphologically and molecularly. Sequencing of similar to 4,200 base pairs (bp) of the nuclear ribosomal genes and similar to 450 bp of the mitochondrial cytochrome c oxidase gene revealed 3 genetically distinct species. One morphotype shared 99-100% sequence identity with metacercariae from the aqueous and vitreous humors of gizzard shad Dorosoma cepedianum and channel catfish Ictalurus punctatus as well as an adult trematode, Austrodiplostomum ostrowskiae, a parasite of the double-crested cormorant Nannopterum auritus. The remaining 2 cercariae morphotypes shared 99-100% sequence identity with an unidentified Tylodelphys sp. and Austrodiplostomum sp. metacercaria from the brain and eyes of several freshwater fish. Herein we molecularly link the cercaria, metacercaria, and adult stage of the life cycle of A. ostrowskiae, identifying the snail host for this parasite, in addition to providing notes on 2 cercariae representing 2 other diplostomids.
机译：眼角膜塑形病是由梁龙科中的吸虫物种引起的，特别是Austrodiplostomum，Diplostomum和Tylodelphys属的那些。双翅目吸虫是全球分布的鱼类寄生虫。寄生于鱼眼的二倍体乙酰胺大量感染可导致急性死亡，而慢性感染通常以视力或失明为特征。在美国东南部，商业cat鱼的生产受到食食性鸟类和寄生它们的许多吸虫物种的威胁。生命周期通常包括食肉性鸟类定宿主，软体动物第一中间宿主和鱼类第二中间宿主。对cat鱼生产池塘中感染蜗牛寄主Hamphensis（= B. obstructa）的寄生虫进行了调查。在2014年夏季，从2个独立的池塘中收集了蜗牛，并观察了尾tre吸虫的释放。总共收集了1,740只蜗牛。观察到三个截然不同的长鼻咽状尾c，并对这些尾and进行了形态和分子表征。核糖体基因的约4,200个碱基对（bp）和线粒体细胞色素c氧化酶基因的约450 bp的测序揭示了3个遗传上不同的物种。一种形态型与来自cer的拟南芥Dorosoma cepedianum和沟cat鱼Ictalurus punctatus的房水和玻璃体液中的尾cer科有99-100％的序列同一性，以及成年的吸虫线虫Austrodiplostomum ostrowskiae，它是双冠nNannopterum auritus的寄生虫。其余2种尾c形态型与未鉴定的Tylodelphys sp具有99-100％的序列同一性。和Austrodiplostomum sp。来自数条淡水鱼的大脑和眼睛的大尾c。在本文中，我们提供了尾曲霉菌的尾c，尾str和成年阶段的分子连接，并鉴定了该寄生虫的蜗牛宿主，此外还提供了代表2种其他二倍体乙酰胺的2种尾c的注释。

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