Title: Radiation resistance and loss of crystal violet binding activity in Y. enterolitica suspended in raw ground pork exposed to gamma radiation and modified atmosphere
Authors: Bhaduri S, Sheen S, Sommers CH
Journal: J Food Sci
Accepted date: 2014 Jan 21
Interpretive summary: Yersinia enterocolitica, a bacterium which can cause severe intestinal distress when consumed in contaminated food, is of particular concern due its ability to grow at refrigeration temperatures. Disease is caused by those strains of bacteria which contain a 70-kb virulence plasmid (pYV). Prior research suggested that the capability of pYV to cause disease could be impaired by conditions similar to those that occur during the processing, packaging, and cooking of foods. This study established that gamma radiation inactivation D10 data for pathogenic Y. enterocolitica irradiated under modified atmosphere can provide information to risk assessors regarding the difference between pathogen presence versus virulence. These results, using Y. enterocolitica as a model system, indicate that the risk of foodborne illness could be affected by the loss of virulence factors when post-process intervention technologies are used. Most importantly, this study highlights the importance of actual virulence of foodborne pathogens, as opposed to mere presence, when assessing risk of actual foodborne illness. The results of this study indicate that the combination of atmosphere and irradiation reduces the ability of pathogenic Y. enterocolitica to infect humans.
Related projects: Detection and Typing of Foodborne Pathogens