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首页> 外文期刊>Parasitology >Parasites infecting the cultured oyster Crassostrea gasar (Adanson, 1757) in Northeast Brazil
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Parasites infecting the cultured oyster Crassostrea gasar (Adanson, 1757) in Northeast Brazil

机译：寄生虫感染巴西东北部养殖牡蛎Crassostrea gasar（Adanson，1757）

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The oyster Crassostrea gasar is a species widely used as food and a source of income for the local population of the estuaries of Northeast Brazil. Perkinsus marinus and Perkinsus olseni are deleterious parasites for oyster farming and were recently detected in Brazil. In this study, a histopathologic survey of the oyster C. gasar cultured in the estuary of the River Mamanguape (Paraiba State) was performed. Adult oysters were collected in December 2011 and March, May, August and October 2012 and processed for histology and Perkinsus sp. identification by molecular analyses. Histopathological analysis revealed the presence of parasitic organisms including viral gametocytic hypertrophy, prokaryote-like colonies, protozoans (Perkinsus sp. and Nematopsis sp.) and metazoans (Tylocephalum sp. and cestodes). Other commensal organisms were also detected (the protozoan Ancistrocoma sp. and the turbellarian Urastoma sp.). The protozoan parasite Perkinsus sp. had the highest overall prevalence among the symbiotic organisms studied (48.9%), followed by Nematopsis sp. (36.3%). The other organisms were only sporadically observed. Only the protozoan Perkinsus sp. caused alterations in the oysters' infected organs. Molecular analyses confirmed the presence of P. marinus, P. olseni and Perkinsus beihaiensis infecting the oyster C. gasar. This is the first report of P. beihaiensis in this oyster species.
机译：牡蛎Crassostrea gasar是一种广泛用作巴西东北河口当地人口的食物和收入来源的物种。珀氏金枪鱼和珀氏金枪鱼是牡蛎养殖的有害寄生虫，最近在巴西被发现。在这项研究中，对在Manmanguape河（Paraiba州）河口养殖的牡蛎C. gasar进行了组织病理学调查。在2011年12月和2012年3月，5月，8月和2012年10月收集成年牡蛎，并对其进行组织学和Perkinsus sp。处理。通过分子分析鉴定。组织病理学分析显示存在寄生生物，包括病毒配子体肥大，原核生物样菌落，原生动物（Perkinsus sp。和Nematopsis sp。）和后生动物（Tylocephalum sp。和cestodes）。还检测到其他共生生物（原生动物Ancistrocoma sp。和turbellarian Urastoma sp。）。原生动物寄生虫Perkinsus sp。在研究的共生生物中总体患病率最高（48.9％），其次是Nematopsis sp。 （36.3％）。仅偶尔观察到其他生物。仅原生动物Perkinsus sp。引起牡蛎感染器官的改变。分子分析证实感染牡蛎C.gasar的P.marinus，P.olseni和Perkinsus beihaiensis的存在。这是北牡蛎牡蛎中该牡蛎种的首次报道。

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