Figure 5.

A and B, Adenosine triphosphate (ATP) levels (A) and survival rates after vancomycin (VAN) exposure (15 μg/mL for 24 hours; B) among persistent methicillin-resistant Staphylococcus aureus (MRSA) bacteremia (PB) strains (black, underlined) and resolving MRSA bacteremia (RB) strains (gray) at the late-exponential phase (ie, after incubation for 6 hours; starting inoculum, 10⁸ colony-forming units [CFU]/mL). C and D, ATP and adenosine diphosphate (ADP) levels (C) and survival rates after VAN exposure (15 μg/mL for 24 hours; D) among the JE2 parental strain and its purF-mutant and purF-complemented strains after incubation for 6 hours (ie, during the late-exponential phase; starting inoculum, 10⁸ CFU/mL). *P < .05, **P < .01, and ***P < .001, compared with their respective PB strains (A and B) and the JE2 parental and purF-complemented strains (C and D).