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:: Volume 15, Issue 2 (4-2016) ::
IJFS 2016, 15 Back to browse issues page
The ability of marine Bacillus spp. isolated from fish gastrointestinal tract and culture pond sediment to inhibit growth of aquatic pathogenic bacteria
Y. Chen * , J. Li , P. Xiao , W. Zhu , Z. Mo
Abstract:   (2136 Views)

In this research, antagonistic activity of two Bacillus species isolated from digestive tract of marine fish and culture pond of sea cucumber was studied. The inhibitory activity of Bacillus spp. isolates against some common pathogenic bacteria of fish was assessed using the agar diffusion method. The strain of B. subtilis G024 exhibited antimicrobial activity against Vibrio anguillarum, V. harveyi, V. vulnificus, Streptococcus sp. and Staphylococcus aureus; the isolate of B. amyloliquefaciens N004 inhibited growth in V. anguillarum, V. campbellii, V. vulnificus, V. parahamolyticus, Edwardsiella tarda, Streptococcus sp., B. cereus. Scanning electron microscopy (SEM) investigation of indicator bacteria showed that cell morphologies were strongly affected by the cell-free supernatant of the two Bacillus spp. isolates. It is determined that the culture filtrates contained inhibitors against growth of some pathogenic bacteria with different degrees of inhibition, although none of the culture filtrates could inhibit the growth of V. fluvialis, V. alginolyticus, V. splendidus. Based upon these characteristics, both of the antagonistic Bacillus spp. isolates could be the potential probiotics used in the aquaculture production.

Keywords: Bacillus, Antagonistic activity, Scanning electron microscopy, Probiotic, Aquaculture
Full-Text [PDF 1063 kb]   (2303 Downloads)    
Type of Study: Orginal research papers | Subject: Genetics
Received: 2016/04/27 | Accepted: 2016/04/27 | Published: 2016/04/27
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Chen Y, Li J, Xiao P, Zhu W, Mo Z. The ability of marine Bacillus spp. isolated from fish gastrointestinal tract and culture pond sediment to inhibit growth of aquatic pathogenic bacteria. IJFS. 2016; 15 (2) :701-714
URL: http://jifro.ir/article-1-2206-en.html


Volume 15, Issue 2 (4-2016) Back to browse issues page
مجله علوم شیلاتی ایران Iranian Journal of Fisheries Sciences
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