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- Title
Raman spectroscopic analysis of the clonal and horizontal spread of CTX-M-15-producing Klebsiella pneumoniae in a neonatal intensive care unit.
- Authors
Guyot, K.; Biran, V.; Doit, C.; Moissenet, D.; Guillard, T.; Brasme, L.; Courroux, C.; Maquelin, K.; Leeuwen, W.; VuThien, H.; Aujard, Y.; Champs, C.; Bingen, E.
- Abstract
Nosocomial outbreaks of extended-spectrum β-lactamase (ESBL)-producing Klebsiella pneumoniae are an increasing concern in neonatal intensive care units (NICUs). We describe an outbreak of ESBL-producing K. pneumoniae that lasted 5 months and affected 23 neonates in our NICU. Proton pump inhibitor and extended-spectrum cephalosporin exposure were significantly associated with the risk of ESBL-producing K. pneumoniae colonisation and/or infection. Thirty isolates recovered from clinical, screening and environmental samples in the NICU were studied by means of Raman spectroscopy, pulsed-field gel electrophoresis and repetitive extragenic palindromic polymerase chain reaction (rep-PCR). The Raman clustering was in good agreement with the results of the other two molecular methods. Fourteen isolates belonged to the Raman clone 1 and 16 to the Raman clone 3. Molecular analysis showed that all the strains expressed SHV-1 chromosomal resistance, plasmid-encoded TEM-1 and CTX-M-15 β-lactamases. Incompatibility groups of plasmid content identified by PCR-based replicon typing indicated that resistance dissemination was due to the clonal spread of K. pneumoniae and horizontal CTX-M-15 gene transfer between the two clones.
- Subjects
BETA lactamases; RAMAN spectroscopy; KLEBSIELLA pneumoniae; NEONATAL intensive care; NOSOCOMIAL infections in children
- Publication
European Journal of Clinical Microbiology & Infectious Diseases, 2012, Vol 31, Issue 10, p2827
- ISSN
0934-9723
- Publication type
Article
- DOI
10.1007/s10096-012-1636-4