Table 3.

Microorganisms grown in culture sets

Organisman%Time to Positivity Mean, hRange (Median)
Gram-positive bacteria, total8622.6
 Methicillin–sensitive Staphylococcus aureus369.513.22.4–25.8 (12.7)
 Methicillin–resistant Staphylococcus aureus4111.48–13.5 (11.9)
 Coagulase-negative Staphylococcus133.425.97.7–84.3 (20.9)
 Other Staphylococci61.62114.8–32.6 (17.35)
 Group B Streptococcus4110.19.6–11.6 (9.61)
 Enterococcus faecalis82.1167.9–38.1 (10.8)
 Otherb153.934.310.8–78.8 (35.5)
Gram-negative bacteria, total287.4
 Serratia marcescens205.322.210.6–65.2 (16.2)
 Escherichia coli4111.811.7–12.6 (11.8)
 Proteus mirabilis4115.915.8–15.9 (15.9)
No bacterial growth26670
  • a There were no blood cultures with fungus growth.

  • b Exiguobacterium species, Kocuria kristinae, Micrococcus, Corynebacterium, Arcanobacterium haemolyticum, and Gemella species.