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Effect of pH on GBS adherence to vaginal epithelial cells. The influence of pH on GBS adherence to VK2 cells was compared between strains 2603 and 2603ΔcsrR (a ΔcsrR mutant) after exposure to pH 5.0 or 7.4. Adherence is shown as a percentage of the initial inoculum (mean ± SD). Each assay was performed at least three times in triplicate. **, P < 0.01; NS, P > 0.05.
