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Photomicrographs of mouse lungs removed on day 28 (hematoxylin and eosin stain; magnification, ×36). (A) Uninfected and untreated; (B) infected and treated daily with 25 mg of INH/kg; (C) infected and treated daily with 400 mg of MXF/kg; (D) infected and untreated; (E) infected and treated weekly with 200 mg of MXF/kg; (F) infected and treated weekly with 400 mg of MXF/kg.
