Enterococcus faecium

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Enterococcus faecium
Scientific classification
Kingdom: Bacteria
Phylum: Firmicutes
Class: Bacilli
Order: Lactobacillales
Family: Enterococcaceae
Genus: Enterococcus
Species: E. faecium
Binomial name
Enterococcus faecium
(Orla-Jensen 1919)
Schleifer & Kilpper-Bälz 1984

Enterococcus faecium is a Gram-positive, alpha hemolytic or nonhemolytic bacterium in the genus Enterococcus.1 It can be commensal (innocuous, coexisting organism) in the human intestine, but it may also be pathogenic, causing diseases such as neonatal meningitis.

Vancomycin-resistant E. faecium is often referred to as VRE.2

Some strains of E. faecium are used as probiotics in animals.3


Linezolid or daptomycin are used to treat VRE infections. The streptogramins, such as quinupristin/dalfopristin, may also be used for vancomycin-resistant E. faecium, but not E. faecalis.Vancomycin resistant E.faecium can be successfully treated with sultamicillin.4


  1. ^ Ryan KJ, Ray CG (editors) (2004). Sherris Medical Microbiology (4th ed.). McGraw Hill. pp. 294–5. ISBN 0-8385-8529-9. 
  2. ^ Mascini EM, Troelstra A, Beitsma M, et al. (March 2006). "Genotyping and preemptive isolation to control an outbreak of vancomycin-resistant Enterococcus faecium". Clin. Infect. Dis. 42 (6): 739–46. doi:10.1086/500322?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub%3dncbi.nlm.nih.gov. PMID 16477546. 
  3. ^ http://www.purinaveterinarydiets.com/Product/FortiFloraCatNutritionalSupplements.aspx
  4. ^ Chewning JH, et al.. "Vancomycin resistant Enterococcus faecium bacteremia successfully treated with high dose ampicillin sulbactam in a pediatric patient after hematopoietic stem cell transplantation". J. Pediatr. Hematol. Oncol.2011rfr_id=10.1097/MPH.0b013e31820db7eb. 

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