Figure 1.

(A) Sequential gating strategy to count lymphocytes and epithelial cells in gut biopsy specimens is shown in representative flow plots for an HIV-negative control adult terminal ileum biopsy. (B) Epithelial cell counts from HIV-negative controls (HNC) and HIV⁺ subjects on ART, respectively, for left colon (LC), right colon (RC), and terminal ileum (TI). (C) Proliferation rates of epithelial cells, measured as Ki-67⁺ % of EpCAM⁺ epithelial cells, in HIV-negative controls (HNC) compared with HIV⁺ subjects on ART.