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Characterization of ESBL (SHV-12) producing clinical isolate of Enterobacter aerogenes from a tertiary care hospital in Nigeria

Author(s): Kasap Murat | Fashae Kayode | Torol Sinem | Kolayli Fetiye | Budak Fatma | Vahaboglu Haluk

Journal: Annals of Clinical Microbiology and Antimicrobials
ISSN 1476-0711

Volume: 9;
Issue: 1;
Start page: 1;
Date: 2010;
Original page

Abstract Background We studied the beta-lactamases of an E. aerogenes isolate recovered from the blood of a two-year-old patient. The isolate demonstrated a disk-diffusion phenotype typical for an AmpC-ESBL co-producer. Methods Microbiology studies were performed according to standard protocols. The resistance gene was identified by transconjugation and cloning experiments. Results By transconjugation only a narrow spectrum beta-lactamase (TEM-1) encoded on a small plasmid was transmitted. The ESBL was cloned and expressed in an E. coli host. Sequence analysis of the recombinant plasmid revealed blaSHV-12 associated to the insertion sequence, IS26. Conclusion This is the first study demonstrated the occurrence of SHV-12 in Nigeria.
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