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  • Title: Extended spectrum beta-lactamases among gram-negative bacteria from an Egyptian pediatric hospital: a two-year experience.
    Author: Zaki Mel S.
    Journal: J Infect Dev Ctries; 2007 Dec 01; 1(3):269-74. PubMed ID: 19734604.
    Abstract:
    BACKGROUND: Knowledge of the anti-microbial susceptibility pattern of common pathogens in a given area helps to inform the choice of empirical antibiotic therapy. The aim of this study was to determine the existence and to describe the characteristics of extended spectrum beta-lactamase (ESBLs) in a pediatric hospital in Mansoura University, Egypt, to aid in the choice of empirical antibiotic therapy. METHOD: Between January 2005 and December 2006, blood samples were collected from children suspected to have nosocomial infections in a pediatric hospital in Mansoura. The gram negative isolates were identified, tested for antimicrobial susceptibility and analyzed for presence of ESBL. RESULTS: A total of 1,600 children with suspected septicemia were studied. Gram negative septicemia was identified in 816 cases (45%). The commonest isolated gram negative bacilli was Klebsiella species (38.2%) followed by Enterobacter species (32.4), Serratia species (16.2%) and Burkholderia cepacia (10.3%). The highest susceptibility was for imipenem (74.3%) followed by gentamicin (70.8%), cefoperazone (64.5%) and cefotaxime (63.2%). The highest resistant rate was for cefazolin and ampicillin/sulbactam (75.5% for each), followed by cefuroxime 70.3% and ceftriaxone (63.5%). The ESBL was found in 44.5% for cefotaxime and 50% for ceftazidime by double discs method. CONCLUSION: This study highlights the emergence of antibiotic resistant gram negative bacilli in a pediatric hospital with special emphasis on extended beta-lactamase resistant strains. Our results show that the most appropriate antibiotics to be used for empirical therapy are amikacin and gentamicin.
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