FIG. 2.
Asymptotic pHs observed during growth of Lactobacillus spp. (○) in vitro correlate with normal vaginal pH regardless of the pHi of the growth medium. The asymptotic pHs observed during the growth of BV organisms (●) fall within the vaginal pH range seen in women with BV—these bacteria do not grow well, if at all, at a lower pHi. All points are means ± standard deviations. Error bars are not shown where the standard deviation is smaller than the symbol.