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Characterization of a vancomycin-resistant Enterococcus faecium outbreak caused by 2 genetically different clones at a neonatal intensive care unit

Authors
Lee, WG; Ahn, SH; Jung, MK; Jin, HY; Park, IJ
Citation
Annals of laboratory medicine, 32(1):82-86, 2012
Journal Title
Annals of laboratory medicine
ISSN
2234-38062234-3814
Abstract
In July 2010, we identified an outbreak of vancomycin-resistant enterococci (VRE) in our 26-bed neonatal intensive care unit. We performed an epidemiological investigation after clinical cultures of 2 neonates were positive for VRE. Identification, susceptibility testing, and molecular characterization were performed. Cultures of 3 surveillance stool samples of inpatients and 5 environmental samples were positive for VRE. All isolates were identified as Enterococcus faecium containing the vanA gene. Two distinct clones were identified by performing pulsed-field gel electrophoresis. The 2 clones exhibited different pulsotypes, but they represented identical Tn1546 types. Two sequence types, ST18 and ST192, were identified among all of the isolates with multilocus sequence typing. Our investigation determined that the outbreak in the neonatal intensive care unit was caused by 2 genetically different clones. The outbreak may have occurred through clonal spread and horizontal transfer of the van gene.
MeSH terms
Anti-Bacterial Agents/pharmacologyBacterial Proteins/geneticsBacterial Typing TechniquesCarbon-Oxygen Ligases/geneticsDNA, Bacterial/analysis*Disease OutbreaksElectrophoresis, Gel, Pulsed-FieldEnterococcus faecium/drug effects/*genetics/isolation & purificationFeces/microbiologyGenotypeGram-Positive Bacterial Infections/diagnosis/epidemiology/*microbiologyHumansInfant, NewbornIntensive Care Units, NeonatalMaleMultilocus Sequence TypingVancomycin/pharmacology*Vancomycin Resistance
DOI
10.3343/alm.2012.32.1.82
PMID
22259784
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Laboratory Medicine
AJOU Authors
이, 위교박, 일중
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