TABLE 3.

Proportion of ID-NAT WP samples detectable by HIV p24 Ag assay and on retest of several ID-NAT and MP-NAT options^*

Pool size	Number of 73 WP samples reactive† (%) in replicate assays
	HIV p24 Ag (single)	Ultrio (12 replicates)	Ultrio Plus (12 replicates)	TaqScreen (six replicates)
IDT	33.0 (45.2)	71.4 (97.8)	71.4 (97.8)	70.8 (97.2)
MP4		67.9 (93.0)	67.4 (92.3)
MP6				64.1 (88.1)
MP8		64.7 (88.6)	65.5 (89.7)
MP16		60.2 (82.4)	62.2 (85.3)

^*Data are reported as number (%).

^†Number of replicates reactive divided by 12 for Ultrio and Ultrio Plus and divided by six for TaqScreen.