(A) Coagulase test. B-0, B-4, and B-16, blank at 0, 4, and 16 h, respectively; NC-0, NC-4, and NC-16, S. epidermidis CMCC 26069 negative control at 0, 4, and 16 h, respectively; PC-0, PC-4, and PC-16, S. aureus ATCC 29213 positive control at 0, 4, and 16 h, respectively; VBNC-0, VBNC-4, and VBNC-16, NTP-induced VBNC S. aureus at 0, 4, and 16 h, respectively; CK-0, CK-4, and CK-16, culturable S. aureus at 0, 4, and 16 h, respectively. (B) Cultivability of VBNC S. aureus incubated in rabbit blood.