Abstract:

A strain isolated from marketed common carp (Cyprinus carpio), identified as Shewanella putrefacens by
biological and molecular identification methods, was used in the growth modeling study. The obtained data were fitted with
three different primary models including Logistic, Gompertz and Banrayi models and the fitted models were validated with
coefficients of determination (r2) of 0.982 4, 0.983 6 and 0.988 4, as well as bias factor (Bf) of 0.985 0, 0.995 0 and 0.970 0
in the internal validation and 0.804, 1.177 and 0.826 in the external validation, respectively. The results showed that the
Baranyi model not only had a goodness-of-fit, but also could provide effective early warnings of microbial food safety risks.
Therefore, the Baranyi model has a great potential for application in agricultural products and foods.

Key words: growth kinetic model, internal validation, external validation, Shewanella putrefacens