Identification and characterization of the pathogenic effect of a Vibrio parahaemolyticus-related bacterium isolated from clam Meretrix meretrix with mass mortality

Journal of Invertebrate Pathology
Xin YueJuntao Jia

Abstract

A mass mortality of clam, Meretrix meretrix, occurred in Jiangsu Province of China in the late September of 2007. Of the isolates obtained from the diseased clams, MM21 had the strongest virulence to the clam in the virulence test, with a LD50 value of approximately 6 x 10(6)CFU ml(-1). MM21 was identified as Vibrio parahaemolyticus by the VITEK 2 Compact system and 16S rDNA sequencing. Detection of virulence-associated genes by PCR indicated that MM21 was positive for toxR and tlh, and negative for tdh. Compared with control group, histiocytes from MM21-infected clams displayed a variety of cytopathological changes by transmission electron microscopy examination, which included increased lipid droplets in hepatocytes, deposition of granules in the mantle, excessive secretion in the gill. The results of our study suggested that MM21 may have been an etiological element in the mass mortalities of hard clam (M. meretrix) in Jiangsu Province of China in 2007.

References

Apr 28, 2004·Diseases of Aquatic Organisms·Fredérique Le RouxFranck Berthe
Apr 10, 2007·Food Microbiology·Yi-Cheng Su, Chengchu Liu

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Citations

May 24, 2011·Marine Biotechnology·Pin HuanBaozhong Liu
Apr 16, 2013·Developmental and Comparative Immunology·Xin YueBaozhong Liu
Oct 13, 2012·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Yan FangLibing Zhang
Jul 15, 2015·World Journal of Microbiology & Biotechnology·Rui LinWenxiong Lin
Apr 23, 2016·Developmental and Comparative Immunology·Linhu Zou, Baozhong Liu
Jan 23, 2017·Fish & Shellfish Immunology·Fengjuan JiangBaozhong Liu
Feb 1, 2019·Critical Reviews in Food Science and Nutrition·Jae-Hyun Yoon, Sun-Young Lee

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