Occurrence of Extended-spectrum Beta-lactamases and the Antibiogram Pattern of Escherichia coli Isolates from Pus and Urine Samples

Abstract

Escherichia coli (E. coli) is a significant species and a common dweller in the guts of humans and animals causing urinary tract infections, wound infection, otitis media, bloodstream infections, and other complications in humans. Worldwide resistance to antimicrobials is a serious public health problem. β-lactamases production by E. coli is responsible for resistance to frequently used beta-lactam antibiotics. 1) To determine antibiotic susceptibility pattern of Escherichia coli isolated from pus and urine samples 2) To determine ESBL producing Escherichia coli and its antibiotic susceptibility pattern. Retrospective study of E. coli isolates from urine and pus samples was performed by collecting data from bacteriology registers. Gender, age details of patients, number of E. coli isolates, and their antimicrobial susceptibility profiles were collected from the records. Out of 747 samples 102 E. coli were isolated and among them 60 (59%) were ESBL producers. Male preponderance was seen i.e. 59 (57.84%) and majority 68 (66.66%) were isolated from the age group of <18 years. E. coli showed maximum sensitivity to imipenem 88 (86.27%), followed by piperacillin-tazobactam 84 (82.35%), aminoglycoside group 76 (74.5%) and maximum resistance was seen to penicillin groups 92 (90.19%), followed by cephalosporins 71 (69.6%). Urinary isolates showed maximum sensitivity to nitrofurantoin (93.67%). ESBL producers showed resistance to ciprofloxacin 47 (78%). This study helps in the periodic formulation of regional antimicrobial policies and also giving continuous information to the clinicians with respect to the sensitivity pattern along with ESBL production which can help to avert further drug resistance.

Keywords

• antimicrobial susceptibility
• escherichia coli
• esbl
• combination disk test