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Journal of Pathogens
Volume 2016 (2016), Article ID 2548517, 4 pages
Research Article

Serotyping and Antimicrobial Susceptibility Pattern of Escherichia coli Isolates from Urinary Tract Infections in Pediatric Population in a Tertiary Care Hospital

Department of Microbiology, PGIMER and Dr. RML Hospital, New Delhi 110001, India

Received 4 October 2015; Revised 28 January 2016; Accepted 8 February 2016

Academic Editor: Hin-Chung Wong

Copyright © 2016 Shweta Sharma et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Urinary tract infections (UTIs) in pediatric population are associated with high morbidity and long term complications. In recent years, there is increased prevalence of Escherichia coli (E. coli) strains producing extended spectrum β-lactamase, Amp C, and Metallo β-lactamase, making the clinical management even more difficult. This study was aimed to detect the serotypes and to determine antimicrobial susceptibility profile of E. coli isolates from urine samples of children <10 yrs old. A total of 75 pure E. coli strains isolated from patients with symptoms of UTI and colony count ≥105 organisms/mL were included in the study. Antibiotic sensitivity pattern showed maximum resistance to nalidixic acid (98.7%), followed by ampicillin (97.3%), amoxi-clavulanate (96%), and fluoroquinolones (92%) while most of the isolates were found sensitive to piperacillin-tazobactam (13.3%), nitrofurantoin (5.3%), and meropenem (1.3%). 48% of the strains were ESBL producer (extended spectrum beta lactamase). 44% strains were typable withantisera used in our study and the most common serogroup was O6 (33.3%) followed by O1 (15.1%) and O15 (15.1%). To conclude, judicious use of antibiotics according to hospital antibiotic policy and infection control measures should be implemented to prevent spread of multidrug resistant organisms.