Isolation of MRSA persisters.

<p>An MRSA overnight culture was treated with 10X MIC (20 μg/mL) gentamicin for 4 h and the titer of viable cells was determined. After the 4 h treatment with gentamicin, the culture was treated with additional antibiotics at the indicated concentrations (10X MIC) for an additional 4 h, followed by once again determining the titer of viable cells. Results are shown as means ± s.d.; n = 3. Gm: gentamicin, Cipro: ciprofloxacin, Van: vancomycin.