Multiple antibiotic-resistance mechanisms including a novel combination of extended-spectrum -lactamases in a Klebsiella pneumoniae clinical strain isolated in Argentina

Abstract excerpt

Klebsiella pneumoniae M1803, isolated from a paediatric patient with chronic urinary infection, presented nine antimicrobial resistance mechanisms harboured on two conjugative megaplasmids, in addition to the chromosomally mediated SHV-1 beta-lactamase. These nine antimicrobial resistance mechanisms comprised two extended-spectrum beta-lactamases (ESBLs) (PER-2 and CTX-M-2), TEM-1-like, OXA-9-like, AAC(3)-IIa,...

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