Centro de Excelencia en Investigaciones Económicas y Sociales en Salud, Vicerrectorado de Investigación, Universidad San Ignacio de Loyola, Lima, Peru.
Universidad Peruana de Ciencias Aplicadas, Lima, Peru.
Am J Trop Med Hyg. 2022 Dec 12;108(1):187-194. doi: 10.4269/ajtmh.22-0240. Print 2023 Jan 11.
The objective of the study was to determine the factors associated with the presence of Escherichia coli contamination in water supplies for human consumption in Peru. A secondary analysis of the Food and Nutrition Surveillance by Life Stages survey (VIANEV) of 2017-2018 was performed. The presence of E. coli contamination in the water samples for human consumption of the households evaluated was defined as a dependent variable. A supply was considered contaminated when there was at least 1 colony-forming unit of E. coli in 100 mL of water for human consumption. Data from 886 participants were analyzed. It was found that 25.2% of household water supply sources for human consumption had E. coli at the time of sampling. Water reservoirs such as buckets or other containers (adjusted prevalence ratio [aPR]: 1.15; 95% confidence interval [CI]: 1.18-1.93), households belonging to a poor wealth quintile (aPR: 1.82; 95% CI: 1.01-3.25), residing in a rural area (aPR: 1.36; 95% CI: 1.01-1.83), and having a low human development index (aPR: 2.12; 95% CI: 1.15-3.91) were more likely to contain E. coli in water supplies for human consumption. However, households with chlorine concentrations of 0.5 mg/L or more in water (aPR: 0.20; 95% CI: 0.11-0.33) and with household members with a higher education (aPR: 0.67; 95% CI: 0.45-0.99) were less likely to contain E. coli in drinking-water supplies. From 2017 to 2018, one in four Peruvians had contamination by E. coli in the water supply to their homes, which was associated with sociodemographic factors, management, and water treatment.
本研究旨在确定与秘鲁人用供水大肠杆菌污染有关的因素。对 2017-2018 年食品和营养监测生命阶段调查（VIANEV）进行了二次分析。将评估家庭的人用饮用水样本中大肠杆菌污染的存在定义为因变量。当人用饮用水中每 100 毫升有至少 1 个大肠杆菌集落形成单位时，供水被认为受到污染。对 886 名参与者的数据进行了分析。结果发现，25.2%的人用供水水源在采样时存在大肠杆菌。储水器，如桶或其他容器（调整后的患病率比 [aPR]：1.15；95%置信区间 [CI]：1.18-1.93）、属于贫困五分位数的家庭（aPR：1.82；95%CI：1.01-3.25）、居住在农村地区（aPR：1.36；95%CI：1.01-1.83）和人类发展指数较低（aPR：2.12；95%CI：1.15-3.91）的家庭更有可能在人用供水中含有大肠杆菌。然而，水中氯浓度为 0.5 毫克/升或更高的家庭（aPR：0.20；95%CI：0.11-0.33）和家庭成员受过更高教育的家庭（aPR：0.67；95%CI：0.45-0.99）不太可能在饮用水供应中含有大肠杆菌。2017 年至 2018 年，四分之一的秘鲁人家庭供水中存在大肠杆菌污染，这与社会人口因素、管理和水处理有关。
