Expression of the Genes Encoding the Trk and Kdp Potassium Transport Systems of Mycobacterium tuberculosis during Growth In Vitro

Table 5

Rate of growth of both strains of Mtb.

Growth phase	ODs	Number of colonies cfu/mL ± SEM	Days achieved
Early-log	0.1–0.3	6.0 × 10^6 ± 6.2 × 10^5–9.5 × 10^7 ± 2.1 × 10^7	1–3
Mid-log	0.4–0.6	6.8 × 10^8 ± 3.6 × 10^7–7.0 × 10^10 ± 1.7 × 10^9	4-5
Late-log	2–2.3	5.0 × 10^11 ± 7.0 × 10^9–2.0 × 10^14 ± 8.0 × 10^12	8-9