Is it human or animal? The origin of pathogenic e. coli in the drinking water of a low-income urban community in bangladesh
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- Is It Human or Animal?
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This study aimed to investigate the origin of diverse pathotypes of E. coli, isolated from communal water sources and from the actual drinking water vessel at the point-of-drinking inside households in a low-income urban community in Arichpur, Dhaka, Bangladesh, using a polymerase chain reaction (PCR). Forty-six percent (57/125, CI 95%: 41−58) of the isolates in the point-of-drinking water and 53% (55/103, CI 95%: 45−64) of the isolates in the source water were diarrheagenic E. coli. Among the pathotypes, enterotoxigenic E. coli (ETEC) was the most common, 81% (46/57) of ETEC was found in the point-of-drinking water and 87% (48/55) was found in the communal source water. Phylogenetic group B1, which is predominant in animals, was the most frequently found isolate in both the point-of-drinking water (50%, 91/181) and in the source (50%, 89/180) water. The phylogenetic subgroup B23, usually of human origin, was more common in the point-of-drinking water (65%, 13/20) than in the source water (35%, 7/20). Our findings suggest that non-human mammals and birds played a vital role in fecal contamination for both the source and point-of-drinking water. Addressing human sanitation without a consideration of fecal contamination from livestock sources will not be enough to prevent drinking-water contamination and thus will persist as a greater contributor to diarrheal pathogens.
Originalsprog | Engelsk |
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Artikelnummer | 181 |
Tidsskrift | Tropical Medicine and Infectious Disease |
Vol/bind | 6 |
Udgave nummer | 4 |
Antal sider | 13 |
ISSN | 2414-6366 |
DOI | |
Status | Udgivet - 2021 |
Bibliografisk note
Funding Information:
Funding: The study was funded by the project entitled Combating Cholera Caused by Climate Change in Bangladesh, C5 (Grant no. 12-040KU) of Danish International Development Agency (DANIDA).
Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
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