Ricke Steven C, Olson Elena G, Ovall Christina, Knueven Carl
Meat Science and Animal Biologics Discovery Program, Department of Animal and Dairy Sciences, University of Wisconsin, 1933 Observatory Drive, Madison, WI 53706, USA.
Jones-Hamilton Company, 30354 Tracy Road, Walbridge, OH 43465, USA.
Pathogens. 2023 Oct 12;12(10):1236. doi: 10.3390/pathogens12101236.
As demands for fresh water become more competitive between the processing plant and other consumers of water such as municipalities, interest has grown in recycling or reusing water for food processing. However, recycling the processing water from a poultry plant, for example, represents challenges due to increased organic loads and the presence of bacterial contaminants including foodborne pathogens. The objective in the current study was to evaluate the inactivation of and O157:H7 using combinations (0.5% and 1%) of sodium bisulfate (SBS) and 1% lactic acid (LA) in water and water with organic matter in the form of horse blood serum (0.3%) with exposure times of 1 min and 5 min. Pathogen reductions after a 5 min exposure time were greater than corresponding reductions after a 1 min exposure time for all acid solutions. The counts were significantly reduced (i.e., ≥1 log-unit) in all acid solutions after a 5 min exposure time with the combination of LA + SBS acid solutions being more effective than the corresponding 2% LA solutions. None of the acid solutions were effective in reducing the O157:H7 after a 1 min exposure time. The 1% LA + 1% SBS solution was the most effective acid solution against both pathogens and was the only acid solution effective in reducing O157:H7 by at least one log unit after 5 min of exposure.
随着加工厂与其他用水户（如市政当局）对淡水的需求竞争日益激烈，人们对食品加工用水的循环利用或再利用的兴趣与日俱增。然而，例如家禽加工厂的加工用水循环利用存在挑战，因为有机负荷增加，且存在包括食源性病原体在内的细菌污染物。本研究的目的是评估在水以及含有0.3%马血清形式有机物的水中，使用硫酸氢钠（SBS）（0.5%和1%）与1%乳酸（LA）的组合，在1分钟和5分钟的暴露时间下对 和O157:H7的灭活效果。对于所有酸溶液，5分钟暴露时间后的病原体减少量大于1分钟暴露时间后的相应减少量。在5分钟暴露时间后，所有酸溶液中的 计数均显著降低（即≥1个对数单位），其中LA + SBS酸溶液组合比相应的2% LA溶液更有效。在1分钟暴露时间后，没有一种酸溶液能有效减少O157:H7。1% LA + 1% SBS溶液是对抗这两种病原体最有效的酸溶液，也是5分钟暴露后唯一能将O157:H7减少至少一个对数单位的酸溶液。
