TABLE 6.

Comparative recovery of contaminants from BACTEC Plus Anaerobic/F and Standard Anaerobic/F blood culture bottles

Microorganism	No. of contaminants recovered from:			P
	Both bottles	Plus Anaerobic/F bottles only	Standard Anaerobic/F bottles only
Gram-positive cocci
Coagulase-negative staphylococci	113	168	59	<0.001
Enterococcia	3	1	8	<0.05
Other gram-positive coccib	4	14	9	NSc
Propionibacterium spp.	1	0	14	<0.001
Other microorganismsd	4	6	18	NS
All microorganisms	125	189	108	<0.001

^aIncludes 13 Enterococcus faecalis isolates and 1 Enterococcus faecium isolate. 

^bIncludes 16 viridans group streptococci, 8 Staphylococcus aureus isolates, and 3 nonhemolytic streptococci. 

^cNS, not significant (P > 0.050). 

^dIncludes seven diphtheroids, five anaerobic diphtheroids, three Bacillus spp., two Cornybacterium spp., two Lactobacillus spp., two Propionibacterium acnes isolates, two Veillonella parvula isolates, one Clostridium paraputrificum isolate, one Peptostreptococcus sp., one Bacteroides intermedius isolate, one Lactobacillus acidophilus isolate, and one yeast whose species was not determined.