초록 close

The present study was carried out to envisage the aerobic growth of Listeria monocytogenes and Yersiniaenterocolitica on pork, which is one of the major meat sources in Korea. The results were compared with the previouslydeveloped predictive model systems for the verification of microbial growth in a real situation during pork processing. Porkloin samples (8.0 g, 5 mm thick) were aseptically prepared and inoculated with each pathogen by immersing into the respectiveinoculums for one min. Each of the samples were then wrapped with PE film and stored at 5, 10, and 15oC up to 36 days tomeasure the growth profile of the respective pathogens. The growth parameters were calculated by using Gompertz equationand were compared with the previously reported data. The predicted generation time (GT) of L. monocytogenes at 5, 10 and15οC was 28.74, 7.85 and 4.02 hr, respectively, and for Y. enterocolitica was 10.29, 4.74 and 2.50 hr, at the same temperaturesrespectively. In this study, the GT values predicted on pork were slightly higher than the values predicted in other studies usingliquid model systems. Unlike previous reports, both the pathogens were found to grow at 5οC on pork. This findingrecommends the necessity of controlling the growth of both the pathogens during the slaughtering process and distribution.