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:: Volume 12, Issue 4 (2013) ::
IJFS 2013, 12 Back to browse issues page
Isolation, identification and phylogenetic analysis of a pathogen of Haliotis diversicolor supertexta (L.) with mass mortalities
Zhou Jing * , Cai Junpeng
, jingzhou-2004@163.com
Abstract:   (8775 Views)
This study was conducted to determine a disease outbreak in 14 day old post-larvae of abalone (Haliotis diversicolor supertexta) which caused mass mortality in July 2010 in Shanwei, China. Twenty-nine bacterial strains were isolated from a sample pool of 10 diseased post-larval abalones on 2216E marine agar plates during a natural outbreak of the disease. Among them, a dominant isolate (referred to as strain 21) was found to be highly virulent to post-larvae in experimental challenge tests, with an LD50 value of 1.0 ×104 colony forming units (CFU) mL-1 on day 3. API 20NE kits and 16S rDNA sequence analysis, identified strain 21 as Oceanomonas doudoroffii. It was susceptible to 10 and moderately susceptible to 1 of the 16 antibiotics examined when antibiotic sensitivities of the bacterium were assayed. Results of this study implicated Oceanomonas doudoroffii strain 21 as a cause of mortalities in post-larval abalone from Shanwei, China.
Keywords: Haliotis diversicolor supertexta, massive death, challenge test, Oceanomonas doudoroffii, 16S rDNA sequencing
Full-Text [PDF 108 kb]   (2571 Downloads)    
Type of Study: Orginal research papers | Subject: fish disease
Received: 2014/01/27 | Accepted: 2014/01/27 | Published: 2014/01/27
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Jing Z, Junpeng C. Isolation, identification and phylogenetic analysis of a pathogen of Haliotis diversicolor supertexta (L.) with mass mortalities. IJFS 2013; 12 (4) :843-854
URL: http://jifro.ir/article-1-1344-en.html


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Volume 12, Issue 4 (2013) Back to browse issues page
Iranian Journal of Fisheries Sciences Iranian Journal of Fisheries Sciences
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