Priming with nano-aerosolized water and sequential dip-washing with hydrogen peroxide: An efficient sanitization method to inactivate Salmonella Typhimurium LT2 on spinach
2015
Zhang, Ming | Oh, Jun Kyun | Huang, Szu-Ying | Lin, Yan-Ru | Liu, Yi | Mannan, Sam | Cisneros-Zevallos, Luis | Akbulut, Mustafa
This work investigates the efficacy of a combined sanitization approach involving pretreatment of nano-aerosolized water followed by H2O2 dip-washing against Salmonella Typhimurium LT2 on spinach. The addition of a pretreatment step utilizing nano-aerosolized water for 5min significantly increased the sanitization efficacy: The number of surviving bacteria was 5.2±0.8CFU/g, 4.7±0.2CFU/g, and 1.1±1.1CFU/g for H2O2 dip-washing only, H2O2 spraying only, and for the combined treatment, respectively. The enhanced efficacy of the combined treatment was attributed to the ability of nano-aerosolized water to reach and fill crevices that tended to form micro airpockets with the liquid (bulk) sanitizer. Overall, these findings may suggest that a short priming step involving nano-aerosolized water may be incorporated in traditional liquid sanitization approaches to enhance their effectiveness.
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