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KGF enhances the clearance of M. tuberculosis after low dose inoculation. Mice were inoculated i.n. with 1 × 102 Erdman M. tuberculosis. Beginning at 30 weeks postinfection, mice were given intranasal saline or KGF (5 mg/kg) on every third day for 2 weeks. The lungs were harvested and homogenized, and cfu were quantified. Data are means ± S.D. (error bars) of at least three independent experiments (n = 4 mice/group). *, p < 0.001.
