Figure 3.

Psychosocial stress increases the variability of data produced by the simian immunodeficiency virus (SIV)-infected macaque model during acute infection. The standard deviations for all time points (preinoculation, days 7, 10, and 14 post-SIV infection) of all data sets (plasma and cerebrospinal fluid viral load, CD4 T cell, CD8 T-cell, and lymphocyte numbers, CD4/CD8 ratio, and the percentage of CD69⁺CD8 T cells and the percentage of CD69⁺CD4 T cells; N = 30 parameters) for both the singly and socially housed macaque groups were compared in a pairwise fashion using a 2-tailed Wilcoxon matched-pairs signed-rank test. *, P = .02.