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Year : 2013  |  Volume : 15  |  Issue : 1  |  Page : 3-6

A comparative analysis of isolation and antibiotic sensitivity pattern of Pseudomonas aeruginosa isolated from pus and urine with special reference to phenotypic and genotypic expression of extended spectrum beta lactamases (ESBLs)

1 Department of Microbiology, Dr. Somervell Memorial CSI Medical College, Karakonam, India
2 Department of Microbiology, Rajah Muthiah Medical College, Annamalai University, Chidambaram, Cuddalore District, Tamil Nadu, India

Correspondence Address:
P A Shiny
Department of Microbiology, Dr. Somervell Memorial CSI Medical College, Karakonam
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0972-1282.116083

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Pseudomonas aeruginosa (Ps. aeruginosa) is a classic opportunistic pathogen with innate resistance to many antibiotics and disinfectants. The aim of this study was to find the prevalence and the resistance pattern, phenotypic, and genotypic characterization of Ps. aeruginosa from different source of infection. The present study was carried out with a total of 1000 clinical samples including 500 pus samples and 500 urine samples, which were received from patients admitted in the various departments of Rajah Muthiah Medical College and Hospital, Annamalai University, Chidambaram. Of the 500 pus and 500 urine samples screened, the percentage positivity of Ps. aeruginosa was 12.8% (64) and 4% (20), respectively. Pseudomonas aeruginosa from different samples showed different sensitivity patterns to different antibiotics. In case of isolates from pus, all (100%) were sensitive to Imipenem, while resistance was maximum to Cefotaxime (93.75%). When Pseudomonas aeruginosa isolated from urine was tested for the same antibiotics, sensitivity was maximum (90%) to Tobramycin, while resistance was maximum (80%) to Cefotaxime and Aztreonam. ESBL positive Ps. aeruginosa isolated from pus and urine was 50% and 40%, respectively. The genotype characterization of 25 of these strains showed 6 with CTX-M and 12 with SHV genes.

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