Fig. 3

Box plots for species richness and Shannon index diversity at the genus level. a Amsel criteria. Richness differed significantly between the Amsel groups (A+ and A−). b Nugent score test. Both richness and Shannon diversity index generally differed markedly for all pair-wise comparisons among Nugent test score groups (N−, N*, and N+). c The five groups defined by both the Amsel criteria and Nugent score test. The richness of the vaginal community was significantly higher in the A − N* group compared to all other groups