TABLE 3.

Neutralization of laboratory-adapted strain SIV251^a

Monkey no.	Titer at indicated time pointb
	Day of ΔV1ΔV2 inoculationb	Wk 8 p.i.	Wk 28 p.i.	Day of SIV239 challengec	Wk 2 p.c.	Wk 12 p.c.	Wk 26 p.c.
Mm 379-89	Negative	1:160	1:80	1:80	1:120	1:60	1:80
Mm 535-99	Negative	1:25	Negative	Negative	Negative	Negative	Negative
Mm 536-99	Negative	1:640	1:140	1:240	1:240	1:2,240	1:4,480
Mm 117-93	1:320	1:560	1:480	1:1,120	1:1,120	1:640	1:1,920
Mm 526-99	Negative	1:25	Negative	Negative	Negative	1:800	1:2,560
Mm 139-99	Negative	Negative	Negative	Negative	Negative	1:2,560	>1:5,120
Mm 322-92	ND	ND	ND	Negative	Negative	1:1,280	1:2,560
Mm 333-95	ND	ND	ND	Negative	Negative	1:1,280	1:4,480
Mm 39-01	ND	ND	ND	Negative	Negative	Negative	ND

^aDilutions that yielded 50% neutralization are shown. Different pools of SIV⁺ rhesus monkey plasma gave titers of 1:1,920 to 1:5,120 when tested in parallel with these assays. p.i., postinoculation; p.c., after WT SIV239 challenge; ND, not done.

^b16 July 2002.

^c9 April 2003.