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首页> 外文期刊>Aquaculture International >Photobacterium damselaesubsp.damselaeassociated with bacterial myonecrosis and hepatopancreatic necrosis in broodstock Pacific white leg shrimp,Litopenaeus vannamei(Boone, 1931)
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Photobacterium damselaesubsp.damselaeassociated with bacterial myonecrosis and hepatopancreatic necrosis in broodstock Pacific white leg shrimp,Litopenaeus vannamei(Boone, 1931)

机译：Photobacterium damselaesubsp.damseassisocation用细菌霉菌和肝癌坏死在Brodstock Pacific腿虾，Litopenaeus Vannamei（Boone，1931）

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摘要

This study presents the first report of myonecrosis and hepatopancreatic necrosis in broodstock ofLitopenaeus vannamei. Of the 400 individuals examined, 34 displayed myonecrosis and hepatopancreatic necrosis, conditions previously reported to be caused by bacterial, fungal, parasite, and viral infections. Gross signs of infection include passive swimming, anorexic and the abdominal muscle become opaque with extensive whitish discoloration of distal abdominal segments and the posterior appendages. Macroscopic necropsy examination revealed atrophied hepatopancreas and empty stomach and mid-gut. The histopathological investigations revealed that reddened muscular lesions are composed of coagulative and liquefactive necrosis of striated muscle fibers, often with edema. The hepatopancreas showed necrotic lesions displaying disorganized lumen and dispersed tubular epithelial cells scattered on necrotic myoepithelial cells. Gill lamellae in infected shrimp showed disorganized, necrotic filaments infiltrated with inflammatory hemocyte. The RT-PCR analysis using OIE-recommended primer and additional sets of primers used in previous studies revealed the absence of IMNV as well as other emerging pathogens including MrNV, PvNV, WSSV, IHHNV, TSV, YHV, AHPND, and EHP. Basis on these negative results, microbiological tests were performed. A dominant yellow-colored bacterial colony was isolated on TCBS agar and identified asPhotobacterium damselaesubsp.damselaeKPD. Injection of the isolate ofP. damselaeKPD proved to be pathogenic toL. vannamei. The study concludes thatP. damselaeKPD is the causative agent of myonecrosis and hepatopancreatic necrosis and represents a threat to the Indian shrimp hatcheries.
机译：本研究介绍了葡萄酒群vannamei的Broodstock中肌坏死和肝癌坏死的第一份报告。在检查的400人中，34种染色的肌坏死和肝癌坏死，先前据报道的病症是由细菌，真菌，寄生虫和病毒感染引起的。感染的总迹象包括被动游泳，厌食症和腹部肌肉变得不透明，具有远端腹部和后阑尾的广泛发白的变色。宏观尸检检查显示出萎缩的肝癌和空腹和中肠。组织病理学调查显示，红细的肌肉病变由常规肌纤维的凝结和液压坏死组成，通常是水肿。肝癌显示坏死性病变，显示散落在坏死肌上皮细胞上的混乱腔和分散的管状上皮细胞。受感染的虾中的鳃薄片显示出混乱的，被炎症血液细胞渗透渗透。使用OIE推荐引物的RT-PCR分析以及在先前研究中使用的另外的引物揭示了IMNV以及其他新出现的病原体，包括MRNV，PVNV，WSSV，IHHNV，TSV，YHV，AHPND和EHP。基于这些负面结果，进行微生物测试。在TCBS琼脂上分离出一种显性的黄色细菌菌落，并鉴定为达菲杆菌DAMSELAESUBSP.damselaekpd。注射分离物OFP。 Damselaekpd被证明是致病性的。 Vannamei。这项研究结束了。 Damselaekpd是肌坏死和肝癌坏死的致病因子，对印度虾孵化有威胁。

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