IN VITRO EFFICACY OF PIPERACILLIN/SULBACTAM, PIPERACILLIN / TAZOBACTAM AND CEFOPERAZONE/SULBACTAM AGAINST CLINICAL ISOLATES OF PSEUDOMONAS AERUGINOSA – A COMPARATIVE STUDY

Authors

  • Irfan Ali Mirza Armed Forces Institute of Pathology Rawalpindi
  • Umme Farwa Armed Forces Institute of Pathology Rawalpindi
  • Shahid Ahmad Abbasi Armed Forces Institute of Pathology Rawalpindi
  • Alina Amjad Armed Forces Institute of Pathology Rawalpindi
  • Zeeshan Ahmed Qureshi Armed Forces Institute of Pathology Rawalpindi
  • Bushra Sultan Armed Forces Institute of Pathology Rawalpindi

Keywords:

Antimicrobial susceptibility, combination antibiotics, Kirby-Bauer disc diffusion method, Pseudomonas aeruginosa

Abstract

Objective: To determine the in vitro efficacy of Piperacillin / Sulbactam, Piperacillin/ Tazobactam and Cefoperazone / Sulbactam against clinical isolates of Pseudomonas aeruginosa.
Study Design: Cross-sectional study
Place and duration of study: Department of Microbiology, Armed Forces Institute of Pathology from January 2010 to September 2010.
Material and Methods: A total of 287 isolates of Pseudomonas aeruginosa recovered from various clinical specimens were taken under consideration. Routine microbiological methods were used to identify the organism. Susceptibility of the isolates was carried out by modified Kirby-Bauer disc diffusion method against piperacillin 100/sulbactam 30 (SPR130μg), cefoperazone 75/sulbactam 30 (SCF105μg) and piperacillin 100/tazobactam 10 (TZP110μg), according to the guidelines provided by Clinical and Laboratory Standards Institute (CLSI).
Results: The highest numbers of Pseudomonas aeruginosa isolates were found in pus swabs, followed by urine and endobronchial washings. Seventy five percent of clinical isolates of P. aeruginosa were susceptible to tazobactam/piperacillin, 71% to piperacillin/sulbactam and 70% to cefoperazone/sulbactam. The difference between the susceptibility of isolates to these three antimicrobials was statistically not significant (p>0.05).
Conclusion: We conclude that there was very little difference in the antimicrobial susceptibility of P. aeruginosa to the three beta-lactam/beta-lactamase inhibitor combination drugs studied. Periodic susceptibility testing should be carried out over a period of two to three years, to detect the current resistance trends. Moreover, a rational strategy on the limited and prudent use of anti-Pseudomonal agents is urgently required.

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Published

31-12-2011

Issue

Section

Original Articles

How to Cite

1.
Mirza IA, Farwa U, Abbasi SA, Amjad A, Qureshi ZA, Sultan B. IN VITRO EFFICACY OF PIPERACILLIN/SULBACTAM, PIPERACILLIN / TAZOBACTAM AND CEFOPERAZONE/SULBACTAM AGAINST CLINICAL ISOLATES OF PSEUDOMONAS AERUGINOSA – A COMPARATIVE STUDY. Pak Armed Forces Med J [Internet]. 2011 Dec. 31 [cited 2024 Jun. 23];61(4):546-50. Available from: https://pafmj.org/PAFMJ/article/view/1114