Comparison of the in vitro susceptibility of Clinical isolates of Pseudomonas aeruginosa in a local hospital setting in Karachi, Pakistan
The objective of this study was to determine and compare the in vitro antibacterial susceptibility of 1008 Pseudomonas aeruginosa isolates obtained from 2800 clinical specimens received at a large hospital setting at Karachi, Pakistan between January 2008 and September 2008. Despite the widespread availability of antibiotics, it remains the most common bacterial infection in the humans. A total of 2800 clinical specimens were analysed for isolation and identification using standard isolation techniques mentioned in ASM’s Clinical Microbiology Manual [1]. Finally, 1008 found to be significant with Pseudomonas aeruginosa (36%), and subjected to antibiotic susceptibility testing in accordance with Kirby and Bauer disc diffusion method [2] and CLSI/NCCLS guidelines 2003 & 2007[8,9] , The isolated pathogens showed resistant to Amikacin (08%), Ceftriaxone(15%), Cefotaxime (16%), Sulzone (Cefapeozone+Sulbactum) (07%), Meropenam (08%), Ciprofloxacin (11%), and Fosfomycin (18%). The results showed considerable variability in the size of zone of inhibition depending on which antibiotic was used. This study also reveals that resistance is developing to Imipenem, and Pseudomonas aeruginosa still remains an important cause of nosocomial infections.