TABLE 1.

Characteristics of rhesus macaques grouped on the basis of CMV serology and SIV infection status

Animal parameter	CMV seropositive			CMV seronegative (SIV−)
	SIV−	WT SIV+a	Attenuated SIV+b
Number	23	9	6	8
Age (yr)
Median	12	4.8	7.5	2.5
Range	2.7-22	2.5-5.7	3.4-12.7	2-4
% CD4 counts
Median	29.5	5.6	36.8	34.8
Range	18.6-65.8	1.8-59.5	19.1-49.8	20.6-49.0
Duration of SIV infection (mo)
Median	NAc	4.5	72.5	NA
Range		3.5-26	15-126
Level of SIV RNA (copies/ml) in plasma
Median	NA	1.1 × 107	NDd	NA
Range		5 × 105-8 × 108

^aAnimals infected with pathogenic SIVmac239 or SIVmac251. WT, wild type.

^bAnimals infected with live attenuated strains of SIV (as described in Results).

^cNA, not applicable.

^dND, not detected.