Md. Furkanur Rahaman Mizana, Iqbal Kabir Jahidab, Minhui Kima, Ki-Hoon Leea, Tae Jo Kimc & Sang-Do Haa*
a School of Food Science and Technology, Chung-Ang University, Anseong, South Korea
b Department of Microbiology, Jessore University Science and Technology, Jessore, Bangladesh
c Department of Food Science, Nutrition and Health Promotion, Mississippi State University, Mississippi, USA
*Corresponding author
Abstract
Vibrio parahaemolyticus is one of the leading foodborne pathogens causing seafood contamination. Here, 22 V. parahaemolyticus strains were analyzed for biofilm formation to determine whether there is a correlation between biofilm formation and quorum sensing (QS), swimming motility, or hydrophobicity. The results indicate that the biofilm formation ability of V. parahaemolyticus is positively correlated with cell surface hydrophobicity, autoinducer (AI-2) production, and protease activity. Field emission scanning electron microscopy (FESEM) showed that strong-biofilm-forming strains established thick 3-D structures, whereas poor-biofilm-forming strains produced thin inconsistent biofilms. In addition, the distribution of the genes encoding pandemic clone factors, type VI secretion systems (T6SS), biofilm functions, and the type I pilus in the V. parahaemolyticus seafood isolates were examined. Biofilm-associated genes were present in almost all the strains, irrespective of other phenotypes. These results indicate that biofilm formation on/in seafood may constitute a major factor in the dissemination of V. parahaemolyticus and the ensuing diseases.
Keywords : Vibrio parahaemolyticus, biofilm formation, quorum sensing, correlation, gene distribution