Salmonella

Effects of sucrose monopalmitate under microbubble generation and/or slightly acidic hypochlorous water（SAHW）on Salmonella Enteritidis were investigated in suspension and on the surface of various materials. In suspension, S. Enteritidis was not injured by the treatment with sucrose palmitate at 100 mg/L under generation of microbubble, though the cells decreased the viable counts by 3.0 log by the treatment with SAHW at 30 mg/L. In contrast, the viable counts decreased only by 1.6 log when S. Enteritidis was treated with sucrose palmitate under microbubble generation and subsequent treatment with SAHW. The viable counts of S. Enteritidis adsorbed on the surface of cabbage leaf decreased by 0 . 3 , 1 . 3 , and 1 . 3 log by the treatment with sucrose monopalmitate under microbubble generation, SAHW and sucrose monopalmitate under microbubble generation followed by SAHW. By the same treatments, the viable counts of S. Enteritidis decreased by 0.7, 3.2, and 4.2 log in cells adsorbed on nitrocellulose membrane, 0.6, 1.2, and 2.3 log in cells on PVDF membrane, 0.7, 1.0, and 0.9 log in cells on Hybond-N+membrane, respectively. It seems that the bacteria adsorbed on the surface of PVDF membrane provide a model system to investigate the efficacy of detergents and sterilizers on decontamination of vegetables.