Table 1.

Survival Time, Plasma/CSF Viral Load, and CD4⁺ T Cell Count

		Viral load (× 104 RNA copies/ml)
Macaque	Survivala(weeks, pi)	Plasma	CSF	CD4+ T cellsb
Morphine-dependent
1/04L	18	3,340	226	3
1/42Nc	19	107,000	111	10
1/28Qc	20	7660	166	6
Control
2/02P	60	2.56	1.67	42
2/AC42	64	0.038	NDd	67
2/31P	147	0.236	NDd	503

^aA monkey surviving <24 weeks after infection was considered a rapid disease progressor.

^bCD4⁺ T cells are presented as number/μl of blood at the time of necropsy.

^cThe animal developed neurological disorders.

^dNot detectable. The viral load was <20 RNA copies/ml.