저장온도에 따른 생참치회 (Thunnus Orientalis) 의 Vibrio Parahaemolyticus 생육예측모델 개발 및 검증

Abstract

Abstract This study developed predictive growth models for V. parahaemolyticus in raw tuna as a function of cold storage temperatures (T; 2, 5, 8, 11 and 15℃). At these storage temperature, Baranyi model, a primary model fit well to obtain lag time (LT) and specific growth rate (SGR) (R2: 0.97). As the temperature increased, the growth of V. parahaemolyticus tend to increase. At 2, 5 and 8°C, no significant growth was observed for 7 days (168 hours). As a result of the primary model using the Baranyi model, the LT values at 11°C and 15°C were 16.01 and 9.04 h, and the SGR values were 0.02 and 0.04 log CFU/h, respectively (R2; 0.98 for LT, 0.97 for SGR). The secondary model was determined to be; LT=35.767−1.784×T+0.069×T2 (R2=0.99), SGR=−0.002+0.002×T+0.000×T2 (R2=0.99). The suitability of LT and SGR was verified using MSE (<0.1: Internal, <0.01: External), Bf (1.000–1.003: Internal, 0.884–0.987: External) and Af (1.000~1.006: Internal, 1.047~1.124: External). Therefore, these predictive models could be supported and useful for predicting the growth of V. parahaemolyticus in raw tuna at various temperature. Ultimately, the developed models can contribute to reducing V. parahaemolyticus levels in the production, distribution and storage of seafood.