FIG. 1.

The stationary-phase survival kinetics of four strains of S. pyogenes. Four different strains of S. pyogenes were inoculated into TH broth and monitored for exit from exponential phase (T₀). Stationary-phase culture aliquots were then removed, serially diluted in sterile TH broth, and plated on TH agar plates to determine the number of CFU per milliliter. Bars in the graph represent the mean number of CFU per milliliter for each time point. Each data set is the mean of results from at least two independent experiments, quantitated in duplicate. Error bars represent the standard deviation between these experiments.