Survival of C57BL/6, C57BL/10, C3H/HeN, CBA, BALB/c, DBA/2, and A/J mice after intravenous infection with 4 × 107 cfu of S. aureus strain SH1000. Each group contained a minimum of 10 mice. Comparison of survival curves was performed by use of log rank test. *P < 0.05.