Objective:To find out the most common bacterial pathogens responsible for post-operative wound infection and their antibiotic sensitivity profile.Materials and Methods:This prospective, observational study was carried out in patients of postoperative wound infection. Samples from wound discharge were collected using a sterile swab and studied for identification of isolates by Gram stains and culture growth followed by in vitro antibiotic susceptibility testing performed by disc diffusion method on Mueller Hinton agar.Results:Out of 183 organisms, 126 (68.85%) isolated organisms were gram negative. Staphylococcus aureus, 48 (26.23%), was the predominant organism. S. aureus was sensitive to rifampicin (89.58%), levofloxacin (60.42%), and vancomycin (54.17%). Pseudomonas aeruginosa was sensitive to ciprofloxacin (83.78%), gatifloxacin (51.35%), and meropenem (51.35%). Escherichia coli was sensitive to levofloxacin (72.41%) and ciprofloxacin (62.07%). Klebsiella pneumoniae was sensitive to ciprofloxacin (63.16%), levofloxacin (63.16%), gatifloxacin (63.16%), and linezolid (56.52%). Proteus mirabilis was sensitive to ciprofloxacin (75%) and linezolid (62.50). Proteus vulgaris was sensitive to ampicillin+sulbactam (57.14%) followed by levofloxacin (50%).Conclusions:There is an alarming increase of infections caused by antibiotic-resistant bacteria, particularly in the emergence of VRSA/VISA, meropenem, and third generation cephalosporin resistant Pseudomonas aeruginosa. Linezolid showing sensitivity against Gram negative bacteria.
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