Diversity of clones and genotypes among vancomycin-resistant clinical enterococcus isolates recovered in a Spanish hospital

  1. López, M. 1
  2. Cercenado, E. 2
  3. Tenorio, C. 1
  4. Ruiz-Larrea, F. 1
  5. Torres, C. 1
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 Hospital General Universitario Gregorio Marañón
    info

    Hospital General Universitario Gregorio Marañón

    Madrid, España

    ROR https://ror.org/0111es613

Journal:
Microbial Drug Resistance

ISSN: 1076-6294

Year of publication: 2012

Volume: 18

Issue: 5

Pages: 484-491

Type: Article

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DOI: 10.1089/MDR.2011.0203 SCOPUS: 2-s2.0-84866501565 WoS: WOS:000309054200004 GOOGLE SCHOLAR

More publications in: Microbial Drug Resistance

Abstract

Forty-three vancomycin-resistant enterococci (VRE) from different patients were recovered in a Spanish Hospital (2003-2010), representing 0.4% of the total of enterococci recovered. Mechanisms detected were vanA (five Enterococcus faecium, two E. faecalis), vanB2 (seven E. faecium, five E. faecalis), vanB1 (one E. faecalis), and vanC1/2 (22 E. gallinarum, 1 E. casseliflavus). Four different Tn1546 structures were found among the seven vanA strains, three of them with insertions (ISEf1 or IS1542) or deletions. Most of the VRE presented a multiresistance phenotype and harbored different resistance genes [erm(B), tet(M), tet(L), ant(6)-Ia, aac(6′)-aph(2″), aph(3′)-IIIa, and catA]. Sixteen unrelated pulsotypes were detected among the 20 vanA/vanB E. faecalis and E. faecium isolates by pulsed-field-gel-electrophoresis and 11 unrelated pulsotypes among the 22 E. gallinarum isolates. Six different sequence types (ST) were demonstrated among the 12 vancomycin-resistant E. faecium strains (one of them new), and 5 were included into the clonal-complex (CC) CC17. Five different ST were detected among the eight E. faecalis strains. The esp gene was detected in 58% and 25% of E. faecium and E. faecalis strains, respectively, and the hyl gene in 78% and 89%, respectively. A high diversity of clones and genotypes of VRE were detected in this hospital. © Mary Ann Liebert, Inc.