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首页> 外文期刊>Applied Microbiology >Vibrio coralliilyticus Strain OCN008 Is an Etiological Agent of Acute Montipora White Syndrome
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Vibrio coralliilyticus Strain OCN008 Is an Etiological Agent of Acute Montipora White Syndrome

机译：珊瑚弧菌菌株OCN008是急性Montipora白色综合症的病因

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摘要

Identification of a pathogen is a critical first step in the epidemiology and subsequent management of a disease. A limited number of pathogens have been identified for diseases contributing to the global decline of coral populations. Here we describe Vibrio coralliilyticus strain OCN008, which induces acute Montipora white syndrome (aMWS), a tissue loss disease responsible for substantial mortality of the coral Montipora capitata in Kāne‘ohe Bay, Hawai‘i. OCN008 was grown in pure culture, recreated signs of disease in experimentally infected corals, and could be recovered after infection. In addition, strains similar to OCN008 were isolated from diseased coral from the field but not from healthy M. capitata . OCN008 repeatedly induced the loss of healthy M. capitata tissue from fragments under laboratory conditions with a minimum infectious dose of between 10~(7) and 10~(8) CFU/ml of water. In contrast, Porites compressa was not infected by OCN008, indicating the host specificity of the pathogen. A decrease in water temperature from 27 to 23°C affected the time to disease onset, but the risk of infection was not significantly reduced. Temperature-dependent bleaching, which has been observed with the V. coralliilyticus type strain BAA-450, was not observed during infection with OCN008. A comparison of the OCN008 genome to the genomes of pathogenic V. coralliilyticus strains BAA-450 and P1 revealed similar virulence-associated genes and quorum-sensing systems. Despite this genetic similarity, infections of M. capitata by OCN008 do not follow the paradigm for V. coralliilyticus infections established by the type strain.
机译：病原体的识别是流行病学和疾病后续管理中至关重要的第一步。已经确定了数量有限的病原体，这些疾病是导致全球珊瑚种群减少的疾病。在这里，我们描述了霍乱弧菌OCN008菌株，该菌株可诱发急性Montipora白综合症（aMWS），这是一种组织损失性疾病，导致夏威夷州卡内奥赫湾珊瑚Montipora capitata的大量死亡。 OCN008在纯培养物中生长，在受实验感染的珊瑚中重现疾病迹象，感染后可恢复。此外，从现场的患病珊瑚中分离出了与OCN008相似的菌株，但没有从健康的M. capitata中分离出菌株。在实验室条件下，OCN008反复诱导健康的人分枝杆菌组织从碎片中流失，最低感染剂量为10〜（7）至10〜（8）CFU / ml水。相反，Porites compressa未被OCN008感染，表明病原体具有宿主特异性。水温从27℃下降到23℃会影响发病时间，但感染的风险并未显着降低。在用OCN008感染过程中未观察到温度依赖性漂白，这是由溶珊瑚弧菌型菌株BAA-450所观察到的。将OCN008基因组与致病性溶珊瑚弧菌BAA-450和P1的基因组进行比较，发现相似的毒力相关基因和群体感应系统。尽管存在这种遗传相似性，但OCN008感染Capitata的M. capitata并没有遵循由该类型菌株建立的V. Coralliilyticus感染的范例。

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