开发一种不依赖培养的方法来表征柱状黄杆菌对鱼黏液的趋化反应。

Development of a culture independent method to characterize the chemotactic response of Flavobacterium columnare to fish mucus.

作者信息

LaFrentz Benjamin R, Klesius Phillip H

机构信息

United States Department of Agriculture, Agricultural Research Service, Aquatic Animal Health Research Unit, Auburn, AL 36832-4352, United States.

出版信息

J Microbiol Methods. 2009 Apr;77(1):37-40. doi: 10.1016/j.mimet.2008.12.011. Epub 2009 Jan 3.

Abstract

Flavobacterium columnare, the causative agent of columnaris disease, is a significant pathogen of many freshwater fish species worldwide and is considered one of the most important pathogens impacting the channel catfish (Ictalurus punctatus Rafinesque) industry in the United States. Recent research has demonstrated that F. columnare exhibits a chemotactic response to mucus from the skin of catfish and this response may be important for pathogenesis. In this study, a culture independent method was developed to quantify the chemotactic response of F. columnare to skin mucus. The method employs the use of blind-well chemotaxis chambers which overcomes difficulties using the traditional capillary tube assay and uses a cell proliferation assay to quantify viable cells which reduces the time and labor associated with culturing the bacterium. Application of the method to two sets of catfish skin mucus samples demonstrated that there is variation in the chemotactic response of F. columnare to individual catfish mucus samples, and similar results were obtained to previously published research using the traditional capillary tube method. The use of this method will enhance the ability to further characterize the chemotactic response of F. columnare to catfish skin mucus in order to increase the understanding of this important host-pathogen interaction.

摘要

柱状黄杆菌是柱状病的病原体,是全球许多淡水鱼品种的重要病原菌,被认为是影响美国沟鲶(Ictalurus punctatus Rafinesque)养殖业的最重要病原菌之一。最近的研究表明,柱状黄杆菌对鲶鱼皮肤黏液表现出趋化反应,这种反应可能对发病机制很重要。在本研究中,开发了一种非培养方法来量化柱状黄杆菌对皮肤黏液的趋化反应。该方法采用盲孔趋化室,克服了传统毛细管试验的困难,并使用细胞增殖试验来量化活细胞,从而减少了与培养细菌相关的时间和工作量。将该方法应用于两组鲶鱼皮肤黏液样本表明,柱状黄杆菌对单个鲶鱼黏液样本的趋化反应存在差异,并且使用传统毛细管方法获得了与先前发表的研究相似的结果。使用该方法将增强进一步表征柱状黄杆菌对鲶鱼皮肤黏液趋化反应的能力,以便增进对这种重要宿主-病原体相互作用的理解。

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