Serogroups of Escherichia coli from Drinking Water

Journal Environmental Monitoring and Assessment
Publisher Springer Netherlands
ISSN 0167-6369 (Print) 1573-2959 (Online)
Issue Volume 130, Numbers 1-3 / July, 2007
Category Original Article
DOI 10.1007/s10661-006-9390-7
Pages 215-220
Subject Collection Earth and Environmental Science
SpringerLink Date Saturday, October 21, 2006

P. W. Ramteke1  and Suman Tewari1

(1)  Department of Biotechnology, Allahabad Agricultural Institute (Deemed University), Allahabad, Uttar pradesh, 211
007, India

Received: 3 March 2006  Accepted: 28 June 2006  Published online: 21 October 2006

Fifty seven isolates of thermotolerant E. coli were recovered from 188 drinking water sources, 45 (78.9%) were typable
of which 15 (26.3%) were pathogenic serotypes. Pathogenic serogroup obtained were 04 (Uropathogenic E. coli,
UPEC), 025 (Enterotoxigenic E. coli, ETEC), 086 (Enteropathogenic E. coli, EPEC), 0103 (Shiga-toxin producing E. coli,
STEC), 0157 (Shiga-toxin producing E. coli, STEC), 08 (Enterotoxigenic E. coli, ETEC) and 0113 (Shiga-toxin producing
E. coli, STEC). All the pathogenic serotypes showed resistance to bacitracin and multiple heavy metal ions. Resistance
to streptomycin and co-trimazole was detected in two strains whereas resistance to cephaloridine, polymixin-B and
ampicillin was detected in one strain each. Transfer of resistances to drugs and metallic ions was observed in 9 out of
12 strains studied. Resistances to bacitracin were transferred in all nine strains. Among heavy metals resistance to
As3+ followed by Cr6+ were transferred more frequently.