TABLE 3.

Comparative times to detection in BM and BD blood culture bottles when both bottles were positive within 72 h

Microorganism(s)	No. of isolates detected	Time to detection (h)				P value
		BM bottles		BD bottles
		Median	Range	Median	Range
Staphylococcus aureus	108	13	4-74	13	2-57	NSa
Coagulase-negative staphylococci	32	21	4-55	19	3-68	NS
Enterococcus spp.b	66	13	4-70	12	4-57	0.003
Other gram-positive bacteriac	16	13	6-48	11	4-39	0.0001
Escherichia coli	13	12	7-36	10	5-68	NS
Klebsiella pneumoniae	26	11	5-65	10	1-46	0.003
Other Enterobacteriaceaed	23	15	6-58	13	4-44	NS
Pseudomonas aeruginosa	11	18	11-26	15	9-30	NS
Other gram-negative bacteriae	16	17	7-38	15	4-49	0.008
Candida albicans	13	25	16-47	27	15-54	0.014
Other yeastsf	10	34	13-65	36	12-66	NS
Mold	1	62		57
All microorganisms	335	14	4-70	13	1-68	<0.0001

^aNS, not significant (P > 0.05).

^bIncludes 40 Enterococcus faecalis, 23 Enterococcus faecium, and 2 Enterococcus avium isolates and 1 Enterococcus sp. isolate.

^cIncludes five Streptococcus bovis, five viridans group streptococcus, and three Streptococcus pneumoniae isolates and one isolate each of group G streptococcus, Corynebacterium sp., and Aerococcus viridans.

^dIncludes five Serratia marcescens, four Enterobacter cloacae, four Proteus mirabilis, three Klebsiella oxytoca, and two Proteus vulgaris isolates and one isolate each of Citrobacter freundii, Klebsiella ozaenae, Morganella morganii, Providencia rettgeri, and Salmonella enterica serovar Typhi.

^eIncludes six Acinetobacter baumannii, six Stenotrophomonas maltophilia, two Acinetobacter lwoffii, and two Burkholderia cepacia isolates.

^fIncludes five Candida glabrata, three Candida tropicalis, and two Hansenula anomala isolates.