Abstract
The authors proposed a numerical model for bacterial growth to evaluate the effects of hygiene management in fishing ports. Field observations of the viable cell count were executed on the line of handlings of marine products. The observation result was applied to this model, and a biological risk of hygiene management in the fishing port was evaluated quantitatively. It was shown that the viable cell count increased in a short time at risk by contact with a dirty case and the temperature rise of marine products. Some examples of countermeasures for hygiene management were compared by the model, and the effect was recognized in the aspect of the biological risk.