Lee Jaesung, Lopes John A, Pascall Melvin A
Department of Food Science and Technology, Ohio State University, 2015 Fyffe Road, Columbus, OH 43210, USA E-mail:
Microcide Inc., 2727 Second Avenue, Detroit, MI 48201, USA.
J Water Health. 2014 Sep;12(3):418-25. doi: 10.2166/wh.2014.194.
The recovery of microorganisms to different fabrics was evaluated after a washing process combined with a food-grade non-oxidizing acidic formulation and low washing water temperature. Cotton, polyester and a polyester/cotton blend fabric samples were inoculated with Escherichia coli, Listeria innocua and Saccharomyces cerevisiae, then dried for 1 day. They were separately placed in a simulated fabric washer and decontaminated for 1 and 10 min with the acidic formulation at 23 °C water washing temperature. The combination of direct detecting and dilution methods was used to detect survivors on fabrics. The use of ≥ 0.1% acidic formulation in the washing process significantly increased the efficacy of the washing for all fabric samples. Microorganisms on the cotton and mixed fabric appeared to bind more strongly and were more resistant to the washing process. No viability was observed on the fabric swatches at 1 cfu/sample detection limit when the washing process was combined with 0.5% acidic formulation in the 10 min washing cycle. These findings can be used to increase the efficiency of sanitizing fabrics in an environmentally friendly way, for remove harmful microorganisms from them and reduce cross-contamination.
在结合食品级非氧化性酸性配方和低洗涤水温的洗涤过程后，评估了微生物在不同织物上的回收率。将棉、聚酯和聚酯/棉混纺织物样品接种大肠杆菌、无害李斯特菌和酿酒酵母，然后干燥1天。将它们分别放入模拟织物洗涤机中，在23℃水洗温度下用酸性配方进行1分钟和10分钟的去污处理。采用直接检测和稀释方法相结合来检测织物上的存活微生物。在洗涤过程中使用≥0.1%的酸性配方显著提高了所有织物样品的洗涤效果。棉织物和混纺织物上的微生物似乎结合得更紧密，并且对洗涤过程更具抗性。在10分钟洗涤周期中，当洗涤过程与0.5%酸性配方结合使用时，在1 cfu/样品检测限下未在织物样本上观察到微生物存活。这些发现可用于以环保方式提高织物消毒效率，从织物上去除有害微生物并减少交叉污染。
