TABLE 2.
Asymptotic pH of growth medium after acidification by vaginal lactobacillus cultures as a function of pHi
| Species | Asymptotic pH for Lactobacillus culturesa started atb:
|
||
|---|---|---|---|
| 6.2>pHi>5.7 | 5.3>pHi>5.0 | 4.2>pHi>4.0 | |
| L. crispatus | |||
| I | 3.69 ± 0.04 | 3.53 ± 0.05 | 3.74 ± 0.06 |
| II | 3.79 ± 0.05 | 3.61 ± 0.04 | 3.22 ± 0.04 |
| III | 3.78 ± 0.08c | 3.70 ± 0.09c | 3.17 ± 0.08 |
| L. gasseri | 3.64 ± 0.01 | 3.52 ± 0.02 | 3.45 ± 0.01 |
| L. jensenii | |||
| Id | 4.72 ± 0.04 | 4.81 ± 0.02 | No growth |
| II | 4.61 ± 0.02 | No growth | No growth |
| III | 3.93 ± 0.01 | 4.75 ± 0.01 | No growth |
| L. vaginalis | 4.16 ± 0.04 | 4.00 ± 0.04 | 3.37 ± 0.03 |
a
Initial concentration, ∼107 bacteria/ml.
b
Curves fit to 1st-order exponential decay.
c
χ2, >0.01.
d
This species showed a ΔOD600 of <0.2 when started in this pH range.