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首页> 外文期刊>魚病研究 >First Detection of Candidatus Xenohaliotis Californiensis, the Causative Agent of Withering Syndrome, in Japanese Black Abalone Haliotis discus discus in Japan
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First Detection of Candidatus Xenohaliotis Californiensis, the Causative Agent of Withering Syndrome, in Japanese Black Abalone Haliotis discus discus in Japan

机译：日本黑鲍鲍铁线菌首次检测到枯萎综合症的致病因子加利福尼亚异色假丝酵母

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Withering syndrome (WS) is a chronic wasting disease in abalone caused by 'Candidatus Xenohaliotis californiensis', a Rickettsia-like organism (RLO). Japanese black abalone Haliotis discus discus (14-34 mm in shell length) experienced monthly mortality rates of 3 to10% from September 2010 to January 2011 with a cumulative mortality of 33% in a hatchery. Nine moribund animals were examined: five animals by histopathology and four by PCR. In histopathological examination, three animals exhibited basophilic, intracellular bacterial inclusions in the epithelium of the digestive tract. Severe infection was observed in the epithelium of the posterior portion of the esophagus of one animal. Morphological characteristics, and target tissues containing the inclusions were consistent with WS-RLO infection. In a PCR for16S rRNA gene of WS-RLO, a specific fragment was amplified from all four animals, and nucleotide sequences of the amplicons were identical to that of the WS-RLO reported previously. The RLOs observed were conclusively identified as the agent of WS. Despite infection with the WS-RL0, our observations showed little degeneration of the digestive gland and shrinkage of the foot muscle both of which are critical pathological changes in WS. This isthe first report of the WS-RLO found in Japanese black abalone in Japan.
机译：枯萎综合症（WS）是一种鲍鱼慢性枯萎病，由一种立克次体样生物（RLO）导致的“ Candidatus Xenohaliotis californiensis”引起。从2010年9月到2011年1月，日本黑鲍鲍鱼鲍鱼铁饼（壳长14-34毫米）的月死亡率为3％至10％，而在孵化场中的累计死亡率为33％。检查了九只垂死的动物：通过组织病理学检查了五只动物，通过PCR检查了四只。在组织病理学检查中，三只动物在消化道上皮中表现出嗜碱性的细胞内细菌包裹体。在一只动物的食道后部的上皮中观察到严重的感染。形态特征和含有内含物的靶组织与WS-RLO感染一致。在WS-RLO的16S rRNA基因PCR中，从所有四只动物中扩增出一个特定的片段，扩增子的核苷酸序列与先前报道的WS-RLO的核苷酸序列相同。观察到的RLO最终确定为WS的代理。尽管感染了WS-RL0，但我们的观察结果显示，消化腺几乎没有变性，足部肌肉萎缩，这都是WS的关键病理变化。这是在日本的日本黑鲍鱼中发现的WS-RLO的第一份报告。

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