Distribution and Virulence Gene Comparison of Aeromonas Strains Isolated from Diseased Fish and Water Environment

Qun Lan Zhou, Yi Juan Wang, Jun Xie, Xian Ping Ge, Bing Wen Xi, Bo Liu
Pol J Microbiol
2013; 62 (3):
ICID: 1072796
Article type: Short communication
IC™ Value: 6.00
Abstract provided by Publisher
A total of 71 Aeromonas strains were isolated in the south of Jiangsu Province China in order to analyze the difference of Aeromonas spp. distribution between diseased fish and water environment. The sequence of 16S rDNA and gyrB demonstrated that the 71 Aeromonas isolates could be divided into 4 species, including A. veronii (55), A. hydrophila (11), A. salmonicida (3) and A. media (2). A. veronii was the most common species isolated from fish and water environment. But A. hydrophila was distributed significantly differently in diseased fish and water environment (P<0.05). All Aeromonas isolates were screened for three putative virulence genes, aer, hly and alt. Of 71 strains analyzed, 50 (70.43 %) were positive for at least one of the virulence genes examined including 4 with three virulence genes, 17 with two virulence genes and 31 with one virulence gene. As to the respective gene, hly was the most common gene among three virulence genes.

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