Table 2.

Limit of detection of the Aptima HIV-1 RNA qualitative assay

Concn (cp/ml) of control HIV-1 RNA	No. of reactive samples/no. of tested samples (%; 95% CI)
100	8/8 (100; 67.5–100)
50	7/7 (100; 64.6–100)
25	12/12 (100; 75.8–100)
12.5	11/12 (91.6; 64.6–98.5)
6.1	9/12 (75; 46.8–91.1)
3.1	5/10 (50; 23.7–76.3)
1.6	5/10 (50; 23.7–76.3)
<1	0/12 (0; 0, 24.2)
Negative control	0/12 (0; 0, 24.2)