The impact of social status on immune health in baboons.

A) High social status animals showed an age-dependent increase in CMV titers (n = 15), while CMV titers in subordinate animals were not affected by age (n = 20). The black line represents linear regression of the impact of age on CMV titers in high social status animals (r = 0.54; P<0.05), while the grey line represents linear regression in subordinate baboons (not significant). B) High social status animals also had a decrease number of CD4+ and CD+ 8 naïve cells compared to subordinate baboons (n = 15/group). C) Total serum cortisol concentration was increased in dominant female baboons (n = 10) compared to subordinate females (n = 20). Different lower case letters represent differences between groups, P<0.05.