Phenotypic Distinction in Enterococcus faecium and Enterococcus faecalis Strains between Susceptibility and Resistance to Growth-Enhancing Antibiotics | Zendy

Patrick Butaye | Zendy; Luc Devriese | Zendy; Freddy Haesebrouck | Zendy

Open Access

Phenotypic Distinction in Enterococcus faecium and Enterococcus faecalis Strains between Susceptibility and Resistance to Growth-Enhancing Antibiotics

Author(s) -

Patrick Butaye,

Luc Devriese,

Freddy Haesebrouck

Publication year - 1999

Publication title -

antimicrobial agents and chemotherapy

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.07

H-Index - 259

eISSN - 1070-6283

pISSN - 0066-4804

DOI - 10.1128/aac.43.10.2569

Subject(s) - virginiamycin , tylosin , bacitracin , enterococcus faecium , microbiology and biotechnology , enterococcus faecalis , biology , agar dilution , antibiotics , enterococcus , antibiotic resistance , minimum inhibitory concentration , bacteria , genetics , staphylococcus aureus

Susceptibility ofEnterococcus faecium andEnterococcus faecalis strains from animals and foods to growth-promoting antibiotics used in animal feed was tested by the agar dilution technique. Acquired resistance to bacitracin, narasin, tylosin, and virginiamycin was seen for both species, and forE. faecium , resistance to avilamycin and avoparcin was also seen. Drawing the distinction between susceptibility and resistance based on frequency distributions of MICs was easy with avoparcin, avilamycin, and tylosin but difficult with virginiamycin and to some extent also with bacitracin and narasin.

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