CCR6 and bacterial vaginosis: To investigate the impact of BV on Th17 cells, we first analyzed the frequency of Th17 cells (defined as CD161+CCR6+ Tconv cells; ref. 49) (Supplemental Figure 1) among total Tconv cells and found that the frequency of Th17 cells as a proportion of total Tconv cells was not significantly increased in any of the tissue types comparing BV+ and BV– individuals (Figure 5A).