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Saudi Journal of Kidney Diseases and Transplantation
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ORIGINAL ARTICLE Table of Contents   
Year : 2004  |  Volume : 15  |  Issue : 2  |  Page : 135-139
Antimicrobial Resistance Patterns of Gram-Negative Bacteria Isolated from Urine Cultures at a General Hospital

Department of Clinical Microbiology, Almana General Hospital, Alkhobar, Saudi Arabia

Correspondence Address:
Abdulrahman Abdulla Kader
Department of Clinical Microbiology, Almana General Hospital, P.O.Box 1364, Alkhobar 31952
Saudi Arabia
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PMID: 17642764

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To evaluate the antimicrobial resistance patterns of the Gram-negative organisms isolated from urine culture, we retrospectively analyzed the urine cultures and antibiotic sensitivity tests of inpatients and outpatients in our hospital between 1999 and 2002. A total of 11,659 urine specimens were analyzed of which 2054(17.6%) showed significant growth; 1764 (85.9%) were Gram-negative organisms. The most frequently isolated Gram-negative organisms were Escherichia coli 1026 (58%) and Klebsiella pneumoniae 293 (16.6%). The resistance rates for strains of E. coli isolated from the hospitalized patients were 61% to amoxicillin, 35% to amoxicillin-clavulanate, 47% to trimethoprim, 38% to ciprofloxacin, 31% to cephalexin and 13% to gentamicin. These rates were higher than those from the outpatients (52%, 36%, 40%, 32%, 29% and 5%), respectively. Out of the 42(2%) multidrug resistant E. coli and K. pneumoniae, 23(1%) were found to be positive for extended spectrum beta lactamase (ESBL) including 14 isolates of E. coli and 9 of K. pneumoniae. We conclude that our findings demonstrate a significant increase of resistance to various groups of antimicrobial drugs in the urine culture isolated from both inpatients and outpatients.

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