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This study is to probe the pattern of antibiotic resistance against aminoglycosides and its mechanism in  E. coli  obtained from patients from Chennai, India. Isolation and identification of pathogens were done on MacConkey agar. Antimicrobial sensitivity testing was done by disc diffusion test. The identification of genes encoding aminoglycoside modifying enzymes was done by Polymerase Chain Reaction (PCR). Out of 98 isolates, 71 (72.45%) isolates were identified as  E. coli  and the remaining 27 (27.55%) as other bacteria. Disc diffusion method results showed a resistance level of 72.15% for streptomycin, 73.4% for gentamicin, 63.26% for neomycin, 57.14% for tobramycin, 47.9% for netilmicin, and 8.16% for amikacin in  E. coli . PCR screening showed the presence of four genes, namely,  rrs ,  aacC2 ,  aacA-aphD , and  aphA3 , in their plasmid DNA. The results point towards the novel mechanism of drug resistance in  E. coli  from UTI patients in India as they confirm the presence of genes encoding enzymes that cause resistance to aminoglycoside drugs. This could be an alarm for drug prescription to UTI patients.

Identification of Genes Coding Aminoglycoside Modifying Enzymes inE. coliof UTI Patients in India