Author(s): KM Mohanasoundaram
Introduction: Pseudomonas aeruginosa is an opportunistic human pathogen and is the leading cause of nosocomial infections especially among patients admitted to intensive care units. (ICU).It has been implicated in diverse nosocomial infections. In recent years, a considerable increase in the prevalence and multidrug resistance (MDR) P.aeruginosa has been noticed with high morbidity and mortality. So we aimed in the present study to determine the status of antimicrobial resistance to individual antipseudomonal agents and the magnitude of multidrug resistance in these organisms. The aim of the study was to retrospectively analyze and determine the distribution rate and antimicrobial resistance pattern in P.aeruginosa among clinical specimens for a period of 3 years.
Methods: P.aeruginosa were isolated and identified by conventional methods. The antimicrobial susceptibility testing was performed by Kirby-Bauer disc diffusion method. The clinical and specimen distribution properties of P.aeruginosa were evaluated based on their resistance.
Results: The isolation rate of P.aeruginosa in this study was 5%, 6.8% and 5% in 2008, 2009 and 2010 respectively. Pus, tracheal aspirates and urine were important sources of P.aeruginosaisolation in ICU and non ICU inpatients. Resistance rates of pseudomonas varied with the antibiotics and the high resistance observed was related to the increased use of broad spectrum antibiotics. Multidrug resistance P.aeruginosa is on the rise especially in nosocomial infections. Hence rigorous monitoring of MDR strains, restriction of inappropriate use of antimicrobial agents and adherence of infection control practices should be emphasized to delay the emergence of clinically significant MDR-P.aeruginosa
Conclusion: To conclude, although multidrug resistance has commonly been reported in nosocomial P.aeruginosa, community acquired data are less frequently reported. For this reason epidemiological studies on the prevalence and antimicrobial susceptibility pattern of resistant isolates in different geographical settings would provide useful information to guide clinicians in their choice of therapy and to contribute to the global picture of antimicrobial resistance. Rigorous monitoring of MDR in P.aeruginosa, restriction of the inappropriate use of antimicrobial agents and adherence of infection control practices should be emphasized to delay the emergence of clinically significant P.aeruginosa.