Exum Natalie G, Olórtegui Maribel Paredes, Yori Pablo Peñataro, Davis Meghan F, Heaney Christopher D, Kosek Margaret, Schwab Kellogg J
Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University , 615 North Wolfe Street, Baltimore, Maryland 21205-2179, United States.
Department of International Health, Bloomberg School of Public Health, Johns Hopkins University , 615 North Wolfe Street, Baltimore, Maryland 21205-2179, United States.
Environ Sci Technol. 2016 Jul 19;50(14):7373-81. doi: 10.1021/acs.est.6b01283. Epub 2016 Jul 8.
Over two billion people worldwide lack access to an improved sanitation facility that adequately retains or treats feces. This results in the potential for fecal material containing enteric pathogens to contaminate the environment, including household floors. This study aimed to assess how floor type and sanitation practices impacted the concentration of fecal contamination on household floors. We sampled 189 floor surfaces within 63 households in a peri-urban community in Iquitos, Peru. All samples were analyzed for colony forming units (CFUs) of E. coli, and households were evaluated for their water, sanitation, and hygiene characteristics. Results of multivariate linear regression indicated that households with improved sanitation and cement floors in the kitchen area had reduced fecal contamination to those with unimproved sanitation and dirt floors (Beta: -1.18 log10 E. coli CFU/900 cm(2); 95% confidence interval [CI]: -1.77, -0.60). Households that did not versus did share their sanitation facility also had less contaminated kitchen floors (Beta: -0.65 log10 E. coli CFU/900 cm(2); 95% CI: -1.15, -0.16). These findings suggest that the sanitation facilities of a home may impact the microbial load found on floors, contributing to the potential for household floors to serve as an indirect route of fecal pathogen transmission to children.
全球有超过20亿人无法使用能充分留存或处理粪便的改良卫生设施。这就导致含有肠道病原体的粪便物质有可能污染环境，包括家庭地面。本研究旨在评估地面类型和卫生习惯如何影响家庭地面上粪便污染的浓度。我们在秘鲁伊基托斯一个城郊社区的63户家庭中对189个地面表面进行了采样。所有样本都分析了大肠杆菌的菌落形成单位（CFU），并评估了家庭的水、卫生和卫生特征。多元线性回归结果表明，厨房区域有改良卫生设施和水泥地面的家庭，其粪便污染程度低于卫生设施未改良且地面为泥土地面的家庭（β：-1.18 log10大肠杆菌CFU/900平方厘米；95%置信区间[CI]：-1.77，-0.60）。不共用卫生设施的家庭与共用卫生设施的家庭相比，厨房地面污染也较少（β：-0.65 log10大肠杆菌CFU/900平方厘米；95% CI：-1.15，-0.16）。这些发现表明，家庭的卫生设施可能会影响地面上发现的微生物负荷，这使得家庭地面有可能成为粪便病原体向儿童传播的间接途径。
