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Adjunctive drug treatment with verapamil improves pathology of Mycobacterium tuberculosis–infected lungs. (A) Microscopic histopathology of lungs at 2 weeks of infection in C3HeB/FeJ mice. The left panel is hematoxylin and eosin staining (40×), and the right panel is acid fast staining for M. tuberculosis H37Rv (500×). (B) Gross lung pathology at 8 weeks of treatment in different groups, as indicated.
