TABLE 9.

Concentrations of free HIV-1 p24 antigen measured by the improved immunoassay and HIV-1 virion-associated p24 antigen calculated from HIV-1 RNA copies measured by RT-PCR (panels 10, 14, 16, 17, 18, and 19)

HIV-1 seroconversion serum panel no.	Days after initial blood collection	HIV-1 p24 antigen measured by the improved immunoassay		HIV-1 RNA measured by RT-PCR			Ratio (F/A)
		Cutoff index	Amt (pg/ml) (F)	Cut-off index	Copies/ml	Virion-associated p24 antigen (pg/ml) (A)
10 (SV-0241)	0	29	0.96	110	43,000	1.0	0.93
	6	5,800	190	7,500	3,000,000	72	2.7
	8	2,400	79	2,500	1,000,000	24	3.3
	14	150	5.1	300	120,000	2.9	1.8
	16	48	1.6	88	35,000	0.84	1.9
	21	1.8	0.06	9.8	3,900	0.09	0.66
	23	0.70		3.8	1,500	0.04
14 (SV-0211)	0	1,000	34	375	150,000	3.6	9.4
	2	6,600	220	1,700	660,000	16	14
	13	3,100	100	3,300	1,300,000	31	3.4
	15	1,200	41	950	380,000	9.1	4.5
	22	85	2.8	22	8,800	0.21	13
16 (panel X)	0	0.23		<0.1
	2	0.22		<0.1
	8	0.26		<0.1
	10	0.21		<0.1
	26	2,600	88	340	130,000	3.2	27
	33	590	20	80	32,000	0.77	26
	35	100	3.4	30	12,000	0.28	12
	40	120	3.9	13	5,100	0.12	32
17 (panel Y)	0	0.44		<0.1
	10	0.21		<0.1
	18	0.20		<0.1
	22	0.19		<0.1
	44	350	12	390	140,000	3.8	3.1
	49	160	5.4	430	170,000	4.1	1.3
18 (panel AR)	0	0.40		<0.1
	2	0.29		<0.1
	9	9.1	0.30	25	9,800	0.24	1.3
	14	780	26	2,200	880,000	21	1.2
19 (panel 6240)	0	0.20		<0.1
	2	0.17		<0.1
	7	0.11		<0.1
	9	0.13		<0.1
	14	0.11		<0.1
	16	0.26		<0.1
	21	25	0.82	46	19,000	0.45	1.8
	23	310	10	380	150,000	3.6	2.9
	28	5,200	170	2,500	1,000,000	24	7.2
	30	7,900	260	2,500	990,000	24	11
	36	1,100	36	720	290,000	6.9	5.1
	45	180	6.1	64	25,000	0.61	10
	53	99	3.3	47	19,000	0.45	7.3