Table 4.

Time of signaling of blood culture samples by BACTEC 9240 blood culture systema

Incubation time (h)No. of blood culture samples with indicated reading/no. sampled (%)
Instrument false positiveInstrument true positive
0–2438/70 (54)0/45 (0)
24–4829/70 (41)30/45 (67)
48–1203/70 (4)15/45 (33)
  • a Instrument false-positive samples signaled statistically significantly sooner than instrument true-positive samples (P < 0.0001) .