TABLE 4.
Mean times to detection of clinically important isolates from adequately filled bottles by the VTI and 3D blood culture systems
| Microorganism (no. of isolates or strains) | Mean time to detection (h) by:
|
|||
|---|---|---|---|---|
| VTI | 3D | |||
| Gram-positive cocci
|
||||
| S. aureus (43) | 17.6 | 19.1 | ||
| Coagulase-negative staphylococci (36) | 21.6 | 21.0 | ||
| Streptococcus and Enterococcus spp.a (60) | 15.7 | 17.9 | ||
| Gram-negative bacilli
|
||||
| Enterobacteriaceaeb (95) | 15.0 | 15.9 | ||
| Nonfermentersc (20) | 14.9 | 16.2 | ||
| Anaerobic bacteriad (11) | 25.3 | 23.9 | ||
| Yeastse (23) | 35.8 | 37.5 | ||
| All microorganisms (288) | 18.4 | 19.6 | ||
Includes 23 Enterococcus faecium isolates, 18 viridans streptococci, 10 Enterococcus faecalis isolates, 5 Enterococcus avium isolates, 2 beta-hemolytic streptococci, 1 Streptococcus pneumoniae isolate, and 1 Enterococcus sp. strain.
Includes 30 Escherichia coli, 20 Klebsiella pneumoniae, 18 Serratia marcescens, 12 Enterobacter cloacae, 5 Enterobacter aerogenes, 5 Proteus mirabilis, 2 Citrobacter freundii, 2 Klebsiella oxytoca, and 1 Enterobacter taylorae isolate.
Includes 13 Stenotrophomonas maltophilia, 6 Pseudomonas aeruginosa, and 1 Acinetobacter baumannii isolate.
Includes four Clostridium septicum, three Bacteroides fragilis, two Bacteroides thetaiotaomicron/ovatus group, one Clostridium tertium, and one Eubacterium lentum isolate.
Includes 10 Candida parapsilosis, 4 Candida albicans, 5 Candida glabrata, and 4 Candida tropicalis isolates.