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首页> 外文期刊>Journal of Food Science >Inactivation of E. coli 0157:H7 on Blueberries by Electrolyzed Water, Ultraviolet Light, and Ozone
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Inactivation of E. coli 0157:H7 on Blueberries by Electrolyzed Water, Ultraviolet Light, and Ozone

机译：电解水，紫外线和臭氧灭活蓝莓上的大肠杆菌0157：H7

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摘要

Increased interest in blueberries due to their nutritional and health benefits has led to an increase in consumption. However, blueberries are consumed mostly raw or minimally processed and are susceptible to microbial contamination like other type of fresh produce. This study was, therefore, undertaken to evaluate the efficacy of electrostatic spray of electrolyzed oxidizing (EO) water, UV light, ozone, and a combination of ozone and UV light in killing Escherichia coli O157:H7 on blueberries. A 5-strain mixture of E. coli O157:H7 were inoculated on the calyx and skin of blueberries and then subjected to the treatments. Electrostatic EO water spray reduced initial populations of E. coli O157:H7 by only 0.13 to 0.24 log CFU/g and 0.88 to 1.10 log CFU/g on calyx and skin of blueberries, respectively. Ozone treatment with 4000 mg/L reduced E. coli O157:H7 by only 0.66 and 0.72 log CFU/g on calyx and skin of blueberries, respectively. UV light at 20 mW/cm~2 for 10 min was the most promising single technology and achieved 2.14 and greater than 4.05 log reductions of E. coli O157:H7 on the calyx and skin of blueberries, respectively. The combination treatment of 1 min ozone and followed by a 2 min UV achieved more than 1 and 2 log additional reductions on blueberry calyx than UV or ozone alone, respectively.
机译：由于其营养和健康益处，人们对蓝莓的兴趣增加，导致消费量增加。但是，蓝莓消耗的大部分是未经加工的或经过最少加工的，并且像其他类型的新鲜农产品一样易受微生物污染。因此，该研究旨在评估静电喷雾（EO）水，紫外线，臭氧以及臭氧和紫外线的组合对杀死蓝莓上的O157：H7大肠杆菌的功效。将5株大肠杆菌O157：H7的混合物接种在蓝莓的花萼和皮肤上，然后进行处理。静电EO水喷雾在蓝莓的花萼和皮肤上分别使大肠杆菌O157：H7的初始种群分别仅减少了0.13至0.24 log CFU / g和0.88至1.10 log CFU / g。用4000 mg / L的臭氧处理后，蓝莓的花萼和皮肤上的大肠杆菌O157：H7分别仅降低了0.66和0.72 log CFU / g。 20 mW / cm〜2的紫外线持续10分钟是最有前途的单项技术，在蓝莓的花萼和皮肤上，大肠杆菌O157：H7的减少分别为2.14和大于4.05 log。分别处理1分钟的臭氧和随后进行2分钟的紫外线，与单独使用紫外线或臭氧相比，蓝莓花萼分别减少了1倍和2倍以上的对数减少。

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