FIG. 6.

Growth rate during recovery from dormancy. After 10 or 40 days of dormancy, the wild-type, DorKO, and DorCO strains were exposed to oxygen and fresh medium and allowed to resume growth. Bacterial growth was measured every day for 5 days by plating on DTA agar plates. The growth rate was calculated by determining the fold increase in the number of CFU compared with the number of bacteria present immediately after the cultures were opened at day 10 or 40. The values are the averages of three experiments. (A) Cultures opened at day 10. (B) Cultures opened at day 40. Squares, H37Rv; triangles, DorKO; circles, DorCO.