Susceptibility of the heat-, acid-, and bile-adapted Vibrio vulnificus to lethal low-salinity stress.
As a marine pathogenic bacterium that inhabits seawater or seafood, Vibrio vulnificus encounters low salinity and other stresses in the natural environment and during food processing. This investigation explores the cross-protective response of sublethal heat-, acid-, or bile-adapted V. vulnificus YJ03 against lethal low-salinity stress. Experimental results reveal that the acid (pH 4.4)- and heat (41 degrees C)-adapted V. vulnificus were not cross-protected against the lethal low-salinity challenge (0.04% NaCl). The bile (0.05%)-adapted exponential- and stationary-phase cells were cross-protected against low salinity, whereas low-salinity (0.12% NaCl)-adapted stationary cells were sensitized against 12% bile stress. Results of this study provide further insight into the interaction between low salinity and other common stresses in V. vulnificus.
Wong
Hin-Chung
HC
Department of Microbiology, Soochow University, Taipei, Taiwan 111, Republic of China. wonghc@scu.edu.tw
Liu
Shu-Hui
SH
D000222:Adaptation, Physiological; D001646:Bile; D015169:Colony Count, Microbial; D005511:Food Handling / Q000379:methods*; D005516:Food Microbiology; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D013997:Time Factors; D041261:Vibrio vulnificus / Q000254:growth & development* / Q000502:physiology*