TABLE 1.

Comparative yields of clinically important isolates from adequately filled bottles in the VTI and 3D blood culture systems

Microorganism	No. of isolates recovered from:			P
	Both systems	VTI only	3D only
Gram-positive cocci
S. aureus	43	13	5	NSa
Coagulase-negative staphylococci	36	5	9	NS
Streptococcus and Enterococcus spp.b	60	16	6	<0.05
Gram-negative bacilli
Enterobacteriaceaec	95	17	15	NS
Nonfermentersd	20	3	6	NS
Anaerobic bacteriae	11	10	3	NS
Yeastsf	23	8	9	NS
All microorganisms	288	72	53	NS

^aNS, not significant (P > 0.05).

^bIncludes 31 Enterococcus faecium isolates, 21 viridans streptococci, 18 Enterococcus faecalis isolates, 5 Enterococcus avium isolates, 5 beta-hemolytic streptococci, 1 Streptococcus pneumoniae isolate, and 1 Enterococcus sp. strain.

^cIncludes 43 Escherichia coli, 28 Klebsiella pneumoniae, 19 Serratia marcescens, 15 Enterobacter cloacae, 7 Enterobacter aerogenes, 6 Proteus mirabilis, 3 Klebsiella oxytoca, 2 Citrobacter freundii, 2 Serratia liquefaciens, 1 Enterobacter taylorae, and 1 Salmonella enteritidis group D isolate.

^dIncludes 16 Stenotrophomonas maltophilia, 11 Pseudomonas aeruginosa, 1 Acinetobacter baumannii, and 1 Ochrobactrum anthropi isolate.

^eIncludes nine Bacteroides fragilis, six Clostridium septicum, four Bacteroides thetaiotaomicron/ovatus group, two Clostridium perfringens, one Bacteroides uniformis, one Clostridium tertium, and one Eubacterium lentum isolate.

^fIncludes 14 Candida parapsilosis, 12 Candida glabrata, 9 Candida albicans, 4 Candida tropicalis, and 1 Candida krusei isolate.