Volume 100, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Although access to piped drinking water continues to increase globally, information on the prevalence and clonal composition of coliforms found in piped water systems in low-resource settings remains limited. From June to July 2016, we examined isolates in domestic water from the distribution system in Alibag, a small town in India. We analyzed the isolates for drug resistance and genotyped them by multilocus sequence typing. Of 147 water samples, 51 contained coliforms, and 19 (37%) of the 51 were biochemically confirmed to contain . These samples contained 104 isolates—all resistant to ampicillin. Resistance to ceftazidime was observed in 52 (50%) isolates, cefotaxime in 59 (57%), sulfamethoxazole–trimethoprim in 46 (44%), ciprofloxacin in 30 (29%), and gentamicin in two (2%). Thirty-eight (36%) belonged to sequence types recognized as extraintestinal pathogenic (ExPEC); 19 (50%) of these 38 ExPEC belonged to known uropathogenic lineages. This exploratory field research shows the extent to which “improved” drinking water is a potential source of strains capable of causing extraintestinal infections.


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  • Received : 01 Jul 2018
  • Accepted : 19 Jan 2019
  • Published online : 04 Mar 2019

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