Keywords :
Amino Acid Sequence; Amino Acid Substitution; Bacterial Proteins/chemistry/genetics; Cefotaxime/pharmacology; Cross Infection/epidemiology/microbiology; DNA, Bacterial/genetics; Drug Resistance, Multiple, Bacterial/genetics; Hospitals, Military; Humans; Intensive Care Units; Klebsiella Infections/epidemiology/microbiology; Klebsiella pneumoniae/classification/genetics/isolation & purification; Molecular Sequence Data; Mutation, Missense; R Factors/genetics; Sequence Alignment; Sequence Analysis, DNA; Sequence Homology, Amino Acid; Tunisia/epidemiology; beta-Lactam Resistance/genetics; beta-Lactamases/chemistry/genetics
Abstract :
[en] A cefotaxime-resistant Klebsiella pneumoniae ML4313 was obtained from a patient from intensive care unit of Military hospital in Tunisia. This strain was resistant to beta-lactams, aminoglycosides, quinolones and phenicols, and tetracyclines. It was identified as producer of extended-spectrum beta-lactamases (ESBL) by double-disk synergy test between amoxicillin-clavulanate and cefotaxime, ceftriaxone, ceftazidime and aztreonam. The ESBL was identified as CTX-M-28 by sequencing of PCR products and by isoelectric focusing. The ESBL resistance was transferred by a 50kb plasmid. CTX-M-28 is closely related to CTX-M-15. This is the first description of this enzyme in Tunisia.
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