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首页> 外文期刊>Journal of the National Research Council of Thailand. Natural science >STUDY OF Macrobrachium rosenbergii NODAVIRUS (MrNV) AND EXTRA SMALL VIRUS (XSV) INFECTION IN INTENSIVE FARM-REARED GIANT FRESHWATER PRAWN (Macrobrachium rosenbergii DE MAN) IN THAILAND
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STUDY OF Macrobrachium rosenbergii NODAVIRUS (MrNV) AND EXTRA SMALL VIRUS (XSV) INFECTION IN INTENSIVE FARM-REARED GIANT FRESHWATER PRAWN (Macrobrachium rosenbergii DE MAN) IN THAILAND

机译：罗氏沼虾Nodavirus（MrNV）和超小型病毒（XSV）感染在泰国大型集约化巨型淡水虾（Macrobrachium rosenbergii DE MAN）中的研究

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A mass mortality outbreaks in hatchery and farm reared Macrobrachium rosenbergii in Thailand was studied during January to October 2005. The clinical signs of affected postlarvae (PL) displayed an opaque whitish appearance of the muscle, particularly in the abdomen. Diseased prawns collected from grow-out ponds exhibited reddish-colored and mortalities. Histopathologically, both infected PL and prawns had areas of slight to moderate striated abdominal muscle necrosis. In spite of this, cytoplasmic inclusion bodies in the connective tissue cells of most organs and tissues were also observed. Particularly, two types of inclusion bodies in hepatopancratic tubular epithelial of diseased prawn. One had hepatopancratic tubular epithelial nuclear enlargement and nucleolar and chromatin margination with eosinophilic nuclear inclusions. Another type showed Cowdry type A inclusions with a clear halo beneath the nuclear membrane. A transmission electron microscopy studied of striated abdominal muscle showed the presence of viral particles, icosahedral in shape, 22-25 nm in diameter similar to Macrobrachium rosenbergii nodavirus (MrNV). The reverse transcription polymerase chain reaction (RT-PCR) determined that all of the infected PL and prawns tested in this studied were positive for MrNV and extra small virus (XSV). The two types of hepatopancreatic inclusions observed in diseased prawn in this studied indicated that they were probably caused by different viruses except MrNV and XSV which caused diseased problem in giant fresh water prawn industry in Thailand.
机译：2005年1月至2005年10月，在泰国的孵化场和农场饲养的罗氏沼虾中爆发了大规模死亡事件。受感染的幼虫（PL）的临床体征显示出肌肉的不透明，发白的外观，尤其是在腹部。从成年池塘收集的病虾显示出红色和致命。在组织病理学上，感染的PL和虾均具有轻度至中度横纹腹肌坏死区域。尽管如此，在大多数器官和组织的结缔组织细胞中也观察到胞质包涵体。特别地，患病虾的肝足管上皮中有两种包涵体。其中一个具有肝足管小管上皮细胞核增大，核仁和染色质边缘化，并带有嗜酸性核包涵体。另一种类型显示出Cowdry A型夹杂物，其在核膜下有明显的晕圈。透射电子显微镜对横纹腹肌的研究表明，与罗氏沼虾诺氏病毒（MrNV）相似，病毒颗粒的形状为二十面体，直径为22-25 nm。逆转录聚合酶链反应（RT-PCR）确定，在此研究中测试的所有感染的PL和虾对MrNV和超小型病毒（XSV）呈阳性。在这项研究中，在患病虾中观察到的两种类型的肝胰腺内含物表明，它们可能是由不同病毒引起的，除了MrNV和XSV引起了泰国巨型淡水虾行业的患病问题。

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