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Antimicrobial Resistance among Producers and Non-Producers of Extended Spectrum Beta-Lactamases in Urinary Isolates at a Tertiary Hospital in Tanzania.

Moyo, S. J., Aboud, S., Kasubi, M., Lyamuya, E. F. and Maselle, S. Y. (2010) Antimicrobial Resistance among Producers and Non-Producers of Extended Spectrum Beta-Lactamases in Urinary Isolates at a Tertiary Hospital in Tanzania. BMC research notes, 3. p. 348. ISSN 1756-0500

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Abstract

Published data on the existence and magnitude of extended spectrum beta-lactamase (ESBL) production in urinary pathogens in local setting is limited. The aim of the present study was to determine the prevalence of antimicrobial resistance and ESBL production among Escherichia coli and Klebsiella spp from urine samples in a tertiary hospital. This was a cross sectional study conducted at Muhimbili National Hospital in Dar es Salaam, Tanzania. A total of 270 E.coli and Klebsiella spp urinary pathogens from children and adults isolated from January to March 2010 were included in the study. E. coli and Klebsiella spp isolates were tested for antimicrobial susceptibility by the Clinical and Laboratory Standard Institute's disc diffusion method. These isolates were further screened for ESBL phenotype using cefotaxime and ceftazidime discs. Isolates with reduced sensitivity were confirmed using ESBL E-test strips. Of 270 isolates, 138 (51.1%) were E. coli and 132 (48.9%) were Klebsiella spp. ESBL was detected in 122 (45.2%) of all the isolates. ESBL- producing E. coli strains were significantly more resistance to cotrimoxazole (90.7%), ciprofloxacin (46.3%) and nalidixic acid (61.6%) than strains that did not produce ESBL (p < 0.05). Similarly, ESBL- producing Klebsiella spp strains were significantly more resistance to cotrimoxazole (92.6%), ciprofloxacin (25.0%), nalidixic acid (66.2%), and gentamicin (38.2%) than strains that did not produce ESBL (P < 0.05). Multi-drug resistance was found to be significantly (P < 0.05) more in ESBL producing isolates (90.5%) than non ESBL producers (68.9%). The occurrence of ESBL was significantly higher among isolates from inpatients than outpatients [95 (50.5%) vs. 27(32.9%)] (p = 0.008). The occurrence of ESBL was significantly higher among isolates from children than in adults [84 (54.9%) vs. 38(32.5%)] (p < 0.001). High prevalence of ESBL-producing E. coli and Klebsiella spp strains was found among inpatients and children. Most of the ESBL- producing isolates were multi-drug resistant making available therapeutic choices limited. We recommend continued antibiotic surveillance as well comprehensive multi-center studies to address the emerging problem of ESBL-associated infections in order to preserve the continued usefulness of most antimicrobial drugs. Further more conducting molecular studies will help to evaluate the various ESBL types.

Item Type: Article
Keywords: Antimicrobial, Spectrum Beta-Lactamases, Urinary, Tertiary Hospita, Muhimbili, pathogens, Klebsiella spp, ESBL, cefotaxime, Tanzania
Subjects: Health Systems > Community Health
Divisions: Muhimbili University of Health and Allied Sciences (MUHAS)
Depositing User: Mr Joseph Madata
Date Deposited: 30 May 2013 06:54
Last Modified: 30 May 2013 06:54
URI: http://ihi.eprints.org/id/eprint/1507

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