Chemoprophylaxis against tuberculosis.
D000328:Adult; D000367:Age Factors; D000818:Animals; D056486:Chemical and Drug Induced Liver Injury; D006168:Guinea Pigs; D006801:Humans; D007538:Isoniazid / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D008875:Middle Aged; D013997:Time Factors; D014374:Tuberculin Test; D014397:Tuberculosis, Pulmonary / Q000517:prevention & control*
D007538:Isoniazid