Household-based ceramic water filters for the prevention of diarrhoea: a randomized, controlled trial of a pilot programme in Colombia.
Oxfam GB undertook a pilot project to explore the use of household-based ceramic water filters in three remote communities in Colombia. In a randomised, controlled trial over a period of 6 months, the filters were associated with a 75.3% reduction in arithmetic mean thermotolerant coliforms (TTCs). A total of 47.7% and 24.2% of the samples from the intervention group had no detectible TTCs/100 mL or conformed to WHO limits for low risk (1-10 TTCs/100 mL), respectively, compared with 0.9% and 7.3% for control group samples. Overall, the prevalence of diarrhoea was 60% less among households using filters than among control households. However, the microbiologic performance and protective effect of the filters was not uniform throughout the study communities, suggesting the need to consider the circumstances of the particular setting before implementing this intervention. American Journal of Tropical Medicine and Hygiene 2005;73:790-5.
Publication Type: Journal article