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Organ bacterial loads of the immunized mice after M. tuberculosis challenge. Immunized BALB/c mice were challenged with 105 CFU of M. tuberculosis H37Rv. The right lungs and spleens of three mice per group were removed and homogenized in Tween 80-PBS. Numbers of bacteria in the spleen (A) and lung (B) were determined by plating the diluted homogenates on Sauton agar. Data represent the mean and standard error (error bar) of three mice per group.
