Research Article

A Phenotypic Characterization of Two Isolates of a Multidrug-Resistant Outbreak Strain of Mycobacterium tuberculosis with Opposite Epidemiological Fitness

Figure 2

In vitro growth of Mp and 410 strains at low pH. The assessed M. tuberculosis strains were grown in Middlebrook 7H9 supplemented with 0.5% glycerol, 0.5% bovine albumin, 0.4% glucose, and 0.05% Tween 80 at pH 5.7. The bacterial growth was determined by OD600nm measurements. One experiment of three with similar results is shown in the figure.