Evolution of Staphylococcus aureus under vancomycin selective pressure: the role of the small-colony variant phenotype.
Antimicrob Agents Chemother
; 59(2): 1347-51, 2015 Feb.
Article
em En
| MEDLINE
| ID: mdl-25451045
ABSTRACT
Staphylococcus aureus small-colony variants (SCVs) often persist despite antibiotic therapy. Against a 10(8)-CFU/ml methicillin-resistant S. aureus (MRSA) (strain COL) population of which 0%, 1%, 10%, 50%, or 100% was an isogenic hemB knockout (Ia48) subpopulation displaying the SCV phenotype, vancomycin achieved maximal reductions of 4.99, 5.39, 4.50, 3.28, and 1.66 log10 CFU/ml over 48 h. Vancomycin at ≥16 mg/liter shifted a population from 50% SCV cells at 0 h to 100% SCV cells at 48 h, which was well characterized by a Hill-type model (R2>0.90).
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Staphylococcus aureus
/
Vancomicina
/
Antibacterianos
Idioma:
En
Revista:
Antimicrob Agents Chemother
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Estados Unidos