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Chemical Decontamination of Footwear Soles to Limit Microbial Transfer in a Dry Environment

机译：在干燥环境中对鞋底进行化学净化以限制微生物转移

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Decontamination of footwear soles by chemical sanitizers is often used in food processing facilities to control the ingress of pathogenic microorganisms and their spread over floor surfaces, although little has been published to validate effectiveness. This study evaluated four decontamination treatments for efficacy in reducing microbial populations on footwear soles and for reducing transfer of those populations from soles to floors. Boot soles were inoculated with a mixture of equal parts of Citrobacterfreundii, Pseudomonas fluorescens, and Serratia marcescens. donned, and subjected to treatment with aqueous quaternary ammonium sanitizer (Aqueous QAC. 1000 ppm) in a footbath mat, dry quaternary ammonium sanitizer (Dry QAC, 1.2% (wt/wt)) in a footbath mat, a spray of sanitizer containing 58.6% isopropyl alcohol and 150 ppm quaternary ammonium compounds (IPA QAC). and an IPA QAC spray followed by Dry QAC in a footbath mat (IPA QAC / Dry QAC). Before and after treatment, footwear soles and floor surfaces were sampled. No significant reductions in microbial populations on soles were observed upon treatment with Aqueous QAC, Dry QAC. compared with no treatment (control). Decontamination with IPA QAC and IPA QAC / Dry QAC resulted in 2.3 and 3.5 logreductions, respectively. Populations recovered from floor surfaces indicated IPA QAC and IPA QAC / Dry QAC treatments significantly reduced transfer of bacteria. Results of this study demonstrate that use of IPA QAC for decontamination of footwear may provide a significant barrier against the spread of microorganisms by foot traffic.
机译：在食品加工设施中，经常使用化学消毒剂对鞋底进行去污，以控制病原微生物的入侵及其在地板表面的扩散，尽管尚未有任何文献证实其有效性。这项研究评估了四种去污处理方法在减少鞋底微生物数量以及减少这些细菌从鞋底转移到地板方面的功效。用等量的弗氏柠檬酸杆菌，荧光假单胞菌和粘质沙雷氏菌的混合物接种靴底。穿戴，并在足浴垫中用季铵水溶液消毒剂（QAC水溶液1000 ppm），在足浴垫中用干季铵盐消毒剂（DQ QAC，1.2％（wt / wt））进行处理，并喷洒含58.6的消毒剂％的异丙醇和150 ppm的季铵化合物（IPA QAC）。然后先在IPA QAC喷雾和IPA QAC喷雾中，再在足浴垫中使用Dry QAC（IPA QAC / Dry QAC）。在处理之前和之后，对鞋底和地板表面进行采样。用含水QAC，干QAC处理后，未观察到鞋底微生物种群的显着减少。与未治疗（对照）相比。使用IPA QAC和IPA QAC /干QAC进行去污分别减少了2.3和3.5个对数。从地板表面恢复的种群表明IPA QAC和IPA QAC /干QAC处理显着减少了细菌的转移。这项研究的结果表明，使用IPA QAC对鞋类进行去污可能会提供一个重要的屏障，以防止因步行而传播的微生物。

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