Abstract

We report on a Klebsiella pneumoniae clinical isolate coproducing bla DHA-1, bla SHV-2a, qnrB4, and aac(6′)-Ib-cr genes. Molecular analysis demonstrated the presence of this combination on the same large plasmid. Despite a negative result for extended-spectrum beta-lactamase (ESBL) by Vitek2® system (bioMérieux, Marcy-l'Etoile, France), an ESBL was detected by a double-disk test. Phenotypic techniques and molecular analysis are key approaches to determine coresistance.

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