Fig. 5
From: Vaginal pH measured in vivo: lactobacilli determine pH and lactic acid concentration
a The asymptotic pH achieved in vitro by lactobacilli is highly correlated (r2 = 0.93) with the vaginal pH of the woman from which the lactobacilli were isolated. Open circles represent women whose CVF contained only L-lactic acid; filled circles represent women whose CVF contained both D- and L-lactic acid. b The concentration of lactate in the supernatants from the in vitro culture correlates more loosely (r2 = 0.44) with the lactate content of the CVF samples from which the lactobacilli were isolated. Open circles represent women whose CVF contained only L-lactic acid; filled circles represent women whose CVF contained both D- and L-lactic acid