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首页> 美国卫生研究院文献>PLoS Clinical Trials >Comparative study on the efficacy of sodium hypochlorite, aqueous ozone, and peracetic acid in the elimination of Salmonella from cattle manure contaminated various surfaces supported by Bayesian analysis
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Comparative study on the efficacy of sodium hypochlorite, aqueous ozone, and peracetic acid in the elimination of Salmonella from cattle manure contaminated various surfaces supported by Bayesian analysis

机译：贝叶斯分析支持的次氯酸钠，臭氧水溶液和过氧乙酸清除牛粪污染表面的沙门氏菌的比较研究

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Providing the dairy industry with an effective and safe disinfectant is considered a key step in improving the farm hygiene and biosecurity. Salmonella infection via foodborne transmission remains a major public health threat. The main objective of this study was therefore to characterize and compare the decontamination power of NaOCl, aqueous-O3, and PAA against cattle manure based-Salmonella heavily contaminated various surfaces (plastic, nylon, rubber, and wood) using Bayesian analysis. In a crossover design, 14 strips of each material were randomly assigned between 3 groups, treatment (n = 6), positive-control (contaminated with feces-Salmonella mixture, but not exposed to disinfectants, n = 6), and negative control (laboratory blank, inoculated only with sterile water, n = 2). The strips were soaked in cattle manure inoculated with 107–108 of Salmonella Typhimurium-Choleraesuis (aSTC) and exposed to 50 mL of 200 ppm NaOCl, 9 ppm aqueous-O3, or 400 ppm PAA for 4 minutes. Bayesian methods were used for analysis. On plastic and nylon surfaces, NaOCl, aqueous-O3, or PAA reduce aSTC population to a safe level (>5.0-log10) within 4 minutes. On rubber surface, PAA and aqueous-O3 can produce a reduction in aSTC population 50% and 30% higher than NaOCl with posterior probabilities of 97% and 90%, respectively. However, PAA can produce reduction factor on wood surface 40% higher than aqueous-O3 and NaOCl with posterior probabilities of 97% and 73%, respectively. We conclude that smooth surfaces were most effectively decontaminated. Peracetic acid of 400 ppm can provide an effective means for controlling Salmonella population heavily contaminated various surfaces in dairy operations. However, the safe residues and strong reactivity makes aqueous-O3 and PAA attractive alternative disinfectants for improving farm hygiene and biosecurity.
机译：为奶业提供有效和安全的消毒剂被认为是改善农场卫生和生物安全的关键步骤。通过食源性传播感染沙门氏菌仍然是主要的公共卫生威胁。因此，本研究的主要目的是使用贝叶斯分析表征和比较NaOCl，O3水溶液和PAA对牛粪基沙门氏菌严重污染的各种表面（塑料，尼龙，橡胶和木材）的去污能力。在交叉设计中，将每种材料的14条试纸随机分为3组：治疗（n = 6），阳性对照（被粪便-沙门氏菌混合物污染，但未暴露于消毒剂，n = 6）和阴性对照（n）。实验室空白，仅用无菌水接种，n = 2）。将这些条浸泡在接种了10 7 –10 8 的鼠伤寒沙门氏菌-霍乱沙门氏菌（aSTC）的牛粪中，并暴露于50 mL 200 ppm NaOCl，9 ppm O3或400 ppm PAA 4分钟。贝叶斯方法用于分析。在塑料和尼龙表面，NaOCl，O3水溶液或PAA可在4分钟内将aSTC种群减少到安全水平（> 5.0-log10）。在橡胶表面，PAA和O3水溶液可以使aSTC种群的减少量比NaOCl高50％和30％，其后概率分别为97％和90％。但是，PAA可以在木材表面产生比O3和NaOCl高40％的还​​原因子，其后发概率分别为97％和73％。我们得出的结论是，对光滑的表面进行了最有效的净化处理。 400 ppm的过氧乙酸可以为控制乳品厂各种表面严重污染的沙门氏菌提供有效的手段。但是，安全的残留物和强的反应性使O3和PAA水溶液成为吸引人的替代消毒剂，可改善农场卫生和生物安全性。

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