TABLE 2.

Comparative yields of clinically important microorganisms in BM and BD blood culture bottles containing samples from patients receiving antimicrobial therapy

Microorganism(s)	No. of isolates detected in:			P value
	Both bottles	BM bottles only	BD bottles only
Gram-positive cocci
Staphylococcus aureus	22	10	7	NSa
Coagulase-negative staphylococci	11	4	2	NS
Streptococcus viridans group	5	0	0	NS
Enterococcus spp.b	22	6	3	NS
Gram-negative bacilli
Enterobacteriaceaec	19	4	2	NS
Other gram-negative bacillid	2	3	2	NS
Anaerobic bacteriae	0	0	1	NS
Yeastsf	9	12	2	<0.025
All microorganisms	90	39	19	<0.01

^aNS, not significant (P > 0.05).

^bIncludes 16 Enterococcus faecalis, 13 Enterococcus faecium, and 2 Enterococcus avium isolates.

^cIncludes 15 Klebsiella pneumoniae, 3 Escherichia coli, 2 Proteus vulgaris, and 2 Serratia marcescens isolates and 1 isolate each of Enterobacter aerogenes, Proteus mirabilis, and Proteus rettgeri.

^dIncludes three Burkholderia cepacia and two Acinetobacter baumannii isolates and one isolate each of Pseudomonas aeruginosa and Stenotrophomonas maltophilia.

^eIncludes one Bacteroides thetaiotaomicron isolate.

^fIncludes 14 Candida albicans, 5 Candida tropicalis, 2 Candida glabrata, and 2 Cryptococcus neoformans isolates.