Evaluation of two recommended disinfection methods for cleaning cloths used in food services of southern Brazil

Brazilian Journal of Microbiology

Sabrina Bartz¹  Eduardo Cesar Tondo¹ 

[1] ,Universidade Federal do Rio Grande do Sul Instituto de Ciência e Tecnologia de Alimentos Porto Alegre RS ,Brazil

关键词: cleaning cloths;    disinfection;    The State of Rio Grande do Sul;    Brazilian food services;   

DOI  :  10.1590/S1517-83822013000300015

来源: SciELO

【 摘 要 】

In the State of Rio Grande do Sul (RS), Southern Brazil, a good manufacturing practices regulation was published recommending two disinfection methods for cleaning cloths used in food services. The aim of the present study was to evaluate the efficacy of those methods. Cleaning cloths were sampled without prior notice at food services, on common working days. For the analyses, the cloths were divided in two sub-samples, being one of them microbiologically analyzed. The second sub-sample was further divided in two pieces and submitted to hand washing for two minutes. After that, one piece was boiled in water for 15 min and the other one was soaked in a 200 ppm sodium hypochlorite solution for 15 min. Both pieces of cloth were submitted to microbiological analyses. Cleaning cloths presented total aerobic mean counts of 6.9 ± 6.7 log/cm². All cleaning cloths presented coliform contamination, and 40% demonstrated mean counts of 6.2 ± 5.6 log/cm². Presumptive S. aureus mean counts of 5.5 ± 4.9 log/cm² were found. No statistic correlation was observed among the number of meals served daily in the food services and the microbiological contamination levels. After washing and disinfection, microbiological counts were significantly (p < 0.05) reduced by both methods, achieving an approximately 5 log reduction. The reductions achieved by the sodium hypochlorite soaking method and the boiling method were not significantly different. Thus, it was possible to conclude that both recommended methods were suitable to disinfect cleaning cloths used in food services.

【 授权许可】

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