Abstract:
The quantitative microbial risk assessment of Vibrio parahaemolyticus in the Thai frozen shrimp,reflecting the impacts of Vibrio parahaemolyticus exposure in frozen shrimp on Thai public health, wasconducted. It is found that dose that causes illness estimated by the number of illness cases and byanimal trials are approximately 1014-1015 Colony Forming Unit per Gram (CFU/g) and 109-1010CFU/g,respectively, using @ Risk software version 4.5 (Palisade Corporation). Results of probability densityfunction analysis and Monte Carlo simulation indicate that the most prevalence of Vibrioparahaemolyticus in frozen shrimp is approximately 66%. The contamination level of Vibrioparahaemolyticus ranges between 106-108 CFU/g. While prevalence in boiled frozen shrimp isapproximately zero. The result implies that heating with an internal temperature of seventy-one Celsiusfor three minutes will effectively decrease the prevalence. The risk of consuming frozen shrimps with350 CFU/g or higher and without heating is approximately 6.6%. To reduce risk arising from theprevalence of Vibrio parahaemolyticus to approach zero, consuming shrimp should be heated with aninternal temperature of seventy-one Celsius for three minutes.