FIG. 6.

Comparison of the numbers of SIV-expressing cells per high-power field (HPF) in the mesenteric lymph nodes and ilea of RP and CP macaques. Five random fields of view (magnification, ×40) of ISH-stained tissues from seven RP and seven CP macaques were photographed from each tissue, and the mean number of SIV⁺ cells per high-power field for each tissue was calculated. Scatter plots of mean numbers of SIV⁺ cells in the mesenteric lymph nodes (A), GALT (B), and lamina propria (C) of the ileum show that RP macaque tissues contained significantly more SIV⁺ cells per high-power field compared to CP macaques (Mann-Whitney U test).