Growth Modelling of Listeria monocytogenes in Korean Pork Bulgogi Stored at Isothermal Conditions

• 발행기관: 한국축산식품학회
• 저자명: Na Kyoung Lee Sin Hye Ahn Joo Yeon Lee Hyun Dong Paik
• 간행물 정보: 『Food Science of Animal Resources』Korean Journal for Food Science of Animal Resources 제35권 제1호, 108~113쪽, 전체 6쪽
• 주제분류: 농수해양 > 식품과학
• 파일형태: PDF
• 발행일자: 2015.02.28

영문 초록

The purpose of this study was to develop predictive models for the growth of Listeria monocytogenes in pork Bulgogi at various storage temperatures. A two-strain mixture of L. monocytogenes (ATCC 15313 and isolated from pork Bulgogi) was inoculated on pork Bulgogi at 3 Log CFU/g. L. monocytogenes strains were enumerated using general plating method on Listeria selective medium. The inoculated samples were stored at 5, 15, and 25°C for primary models. Primary models were developed using the Baranyi model equations, and the maximum specific growth rate was shown to be dependent on storage temperature. A secondary model of growth rate as a function of storage temperature was also developed. As the storage temperature increased, the lag time (LT) values decreased dramatically and the specific growth rate of L. monocytogenes increased. The mathematically predicted growth parameters were evaluated based on the modified bias factor (Bf), accuracy factor (Af), root mean square error (RMSE), coefficient of determination (R2), and relative errors (RE). These values indicated that the developed models were reliably able to predict the growth of L. monocytogenes in pork Bulgogi. Hence, the predictive models may be used to assess microbiological hygiene in the meat supply chain as a function of storage temperature.

키워드

predictive model Listeria monocytogenes Baranyi model pork Bulgogi