FOOD SCIENCE ›› 2018, Vol. 39 ›› Issue (6): 177-182.doi: 10.7506/spkx1002-6630-201806028

• Bioengineering • Previous Articles     Next Articles

Biological Characteristics of Vibrio parahaemolyticus during Growth in Adverse Environment

GAO Lu1, OUYANG Min1, ZHANG Hui2, RAO Shengqi1, YIN Yongqi1, YANG Zhenquan1,3,*, SHEN Mingjun4   

  1. (1. College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, China;2. Institute of Quality Safety and Nutrition of Agricultural Products, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; 3. Jiangsu Key Laboratory of Zoonosis, Yangzhou 225127, China;4. Yangzhou Chaotiange Agriculture and Animal Husbandry Technology Co. Ltd., Yangzhou 225000, China)
  • Online:2018-03-25 Published:2018-03-14

Abstract: The objective of this study was to observe the growth characteristics of Vibiro parahaemolyticus under various environmental stresses. The survival, biofilm formation ability, hemolysin activity and extracellular protease production of V. parahaemolyticus (CICC21617) exposed to low salinity (0.9 g/100 mL NaCl), low pH (5.0) or high temperature (50 ℃) were investigated after 10 passages. It was found that the stressed and passaged strains had enhanced survival and biofilm formation ability and decreased hemolysin activity and showed significantly reduced extracellular protease production compared with the parental strain. The expression levels and types of low molecular weight outer membrane proteins of the stressed strains were also different between the parental and passaged strains. Thus, V. parahaemolyticus is capable of changing their own biological characteristics to adapt to adverse conditions. Furthermore, the tolerance of V. parahaemolyticus to environmental stress can be enhanced after adaptive training.

Key words: Vibrio parahaemolyticu, stress, growth, growth characteristics

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