Flavobacterium covae is the predominant species of columnaris-causing bacteria impacting the Channel Catfish industry in the southeastern United States

IF 1.5 4区 农林科学 Q3 FISHERIES Journal of aquatic animal health Pub Date : 2023-10-20 DOI:10.1002/aah.10207
Benjamin R. LaFrentz, Lester H. Khoo, Mark L. Lawrence, Lora Petrie-Hanson, Larry A. Hanson, Wes A. Baumgartner, William G. Hemstreet, Anita M. Kelly, Julio C. García, John P. Shelley, Amber E. Johnston, Timothy J. Bruce, Matt J. Griffin
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新冠黄杆菌是影响美国东南部斑点叉尾鱼(Ictalurus punctatus)产业的柱状致病菌的主要物种。
柱状体病是美国东南部鲶鱼产业中与疾病相关损失的主要原因。“柱状体致病菌”(CCB)一词是指所描述的四种引起柱状体疾病的物种,即黄杆菌、C.covae、F.davisii和F.orechromis。从历史上看,从鲶鱼行业的柱状体病病例中分离出柱状体吸虫、科氏体吸虫和达氏体吸虫;然而,人们对养殖鲶鱼中哪种CCB最为普遍缺乏了解。目前的研究目标是:(1)对美国鲶鱼行业的柱状体疾病病例进行采样,并确定所涉及的CCB物种;(2)在受控实验室挑战中确定四种CCB物种对鲶鱼的毒力。2015-0027年,从密西西比州和阿拉巴马州的259例柱状体病病例中收集了鲶鱼外部病变的细菌分离株或拭子。使用CCB特异性多重PCR分析从样品中提取的DNA,以鉴定每个诊断病例中存在的CCB。结果表明,C.covae是影响美国鲶鱼产业的CCB的主要物种,占94.2%(n = 244)的诊断病例提交。挑战实验表明,F.covae和F.orechromis对鲶鱼具有高度毒力,导致大多数分离株的死亡率接近100%。相比之下,柱状F.columnare和戴维斯氏F.davisii的毒力较低,导致大多数分离株的死亡率低于40%。总之,这些结果表明,F.covae是美国鲶鱼行业中占主导地位的CCB,旨在制定新的控制和预防策略的研究应该针对这种细菌。本文所述的方法可用于继续监测鲶鱼行业中CCB的流行情况,并可容易地应用于其他行业,以确定哪些黄杆菌物种具有最大的影响。
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来源期刊
Journal of aquatic animal health
Journal of aquatic animal health 农林科学-兽医学
CiteScore
2.50
自引率
0.00%
发文量
25
审稿时长
>24 weeks
期刊介绍: The Journal of Aquatic Animal Health serves the international community of scientists and culturists concerned with the health of aquatic organisms. It carries research papers on the causes, effects, treatments, and prevention of diseases of marine and freshwater organisms, particularly fish and shellfish. In addition, it contains papers that describe biochemical and physiological investigations into fish health that relate to assessing the impacts of both environmental and pathogenic features.
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