TABLE 3.

Comparison of mean times for detection of growth when the same clinically significant microorganism was isolated from both bottles^a

Microorganism	No. of isolates	Detection time (h)
		VA bottles	NVA bottles
Gram-positive cocci	110	15.2	14.8
Gram-positive bacilli	2	21.9	30.8
Gram-negative bacilli	22	21.2	23.7
Fungi	9	37.3	34.6
Total	143	17.6	17.6

^aDifferences in mean detection times were not significant at a P value of 0.05 for any of the organisms tested.