qRT-PCR of fnbB. The effect of clonal variation on fnbB transcription by qRT-PCR, normalized by gyrB, at 6 h postinoculation was evaluated. Isolates with an asterisk (*) were associated with persistent bacteremia (PB) (isolates 300-169, 324-136, 300-246, 088-180, and 077-107) in human patients, whereas isolates without an asterisk are from the RB cohort. For CC45 versus CC5, a P value of 0.10 was determined with Student t test.