Zafar Iqbal Malik and S H Waqar
Department of General Surgery, Shaheed Zulfiqar Ali Bhutto Medical University,
Pakistan Institute of Medical Sciences, Islamabad
Background: Postoperative wound infection continues to be a major complication for patients undergoing operative procedures, and remains a cause of concern for surgeons.
Objective: The aim of this study was to determine spectrum of microorganisms in postoperative wound infections in general surgical wards at Pakistan Institute of Medical Sciences, Islamabad.
Methodology: This prospective observational study was conducted by the Surgical Unit III, PIMS, Islamabad, from July 2012 to June 2014. Data of the patients developing postoperative wound infection of various types were collected and analyzed. Data included clinical features, primary diagnosis, and type of surgery performed, timing when evidence of wound infection was observed, the causative microor-ganism, and their antibiotic sensitivity pattern.
Results: During the study period, 1621 patients were admitted to the surgical ward; out of which 1375 underwent surgery. Among them, 136 patients developed wound infections, giving an overall wound infection rate of 9.9%. In these patients, 129 pathogens were isolated from 121 positive culture samples. In 15 (11.0%) cases, no organism was grown. Majority of the wounds were infected with a single microbial organism (113, 93.4%); while 8 samples (6.6 %) were infected with 2 different types of microbes. The most frequently isolated pathogen was E. Coli (grown in 43 cases, 33.3%); followed by MRSA (20.2%). The antibiotic sensitivity of various bacteria was studied, and it showed change in the sensitivity pattern of E. Coli.
Conclusion: The E. coli is dominating organism in postoperative wound infection in general surgical wards at our hospital. It is showing a change in susceptibility pattern. The problem of emerging drug resistance among bacteria can be minimized by adopting strict aseptic surgical procedures, judicial use of antibiotics, and proper wound care.
Limitation of the study: Anarobic cultures were not performed
Keywords: Postoperative wound infection, microbial sensitivity, surgical site infection.