title: Diarrheal diseases in children from a water reclamation site in Mexico city.
abstract: This study was conducted to assess the risk of enteric diseases among children living in a water reclamation area in Mexico City. A geographic information system was used to define eligible wells and surrounding homesteads. Sixty-five water samples from five wells were tested for fecal coliform bacteria per 100 mL (FC/100 mL) during visits to 750 eligible households; caretakers only in those dwellings with children under 5 years old were interviewed throughout repeated cross-sectional surveys, conducted during 1999-2000. Data on diarrheal diseases were obtained from 761 children during the rainy season and 732 children during the dry season; their guardians also provided information on drinking water supply, sanitation, and socioeconomic variables. The presence of indicator organisms in groundwater samples pointed to fecal pollution; bacterial indicators, however, did not predict the health risk. The rates of diarrhea were 10.7% in the dry season and 11.8% in the rainy season. Children 1 year old showed the highest rate of diarrhea during the dry season [odds ratio (OR) = 2.1 with 95% confidence interval (CI), 0.99-4.71], particularly those from households perceiving unpleasant taste of tap water (OR, 1.7; 95% CI, 0.97-2.92) and consuming vegetables washed only with water (OR, 2.2; 95% CI, 1.10-4.39). Lower risk was observed in individuals enjoying full-day water supply (OR, 0.5; 95% CI, 0.27-0.86) and a flushing toilet (OR, 0.3; 95% CI, 0.16-0.67), as well as those storing water in covered receptacles (OR, 0.3; 95% CI, 0.15-0.80). Rainy season data suggested that children from households perceiving a color to their water had a higher rate of diarrhea than did those without such complaint (OR, 1.8; 95% CI, 0.93-3.67); recent consumption of food sold by street vendors was also a significant risk factor (OR, 1.6; 95% CI, 0.98-2.87). Groundwater is at risk of contamination, as indicated by the presence of FC/100 mL. The endemic pattern of diarrhea, however, reflects mostly inadequate housing, sanitation, and water-related practices. Health protection policy must be discussed.
mesh_terms: D002669:Child Welfare; D002675:Child, Preschool; D003247:Conservation of Natural Resources; D003967:Diarrhea / Q000453:epidemiology / Q000209:etiology*; D004782:Environmental Health; D005249:Fees and Charges; D005260:Female; D040362:Geographic Information Systems; D006798:Housing; D006801:Humans; D006920:Hygiene; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008800:Mexico; D016017:Odds Ratio; D011891:Rain; D018570:Risk Assessment; D012621:Seasons; D012989:Soil Pollutants / Q000009:adverse effects*; D014505:Urban Population; D014873:Water Pollutants / Q000009:adverse effects*; D014881:Water Supply
chemical_list: D012989:Soil Pollutants; D014873:Water Pollutants