Prophylaxis Against Tuberculosis (TB) in Patients With Human Immunodeficiency Virus (HIV) Infection and Confirmed Latent Tuberculous Infection

Inclusion Criteria Concurrent Medication: Allowed: * Antiretroviral treatment. * Pneumocystis carinii pneumonia prophylaxis. * Treatment for acute opportunistic infection/malignancy. * Aminoglycosides, quinolones or fluoroquinolones such as ciprofloxacin or ofloxacin for \< 14 days for treatment of intercurrent infection. Patients must have: * HIV infection. * Signed informed consent. * Reasonably good health at time of study entry. * Perceived life expectancy of at least six months. * Allowed: * Participation in other clinical trials as long as there is no potential activity of other study drugs against Mycobacterium tuberculosis (MTb), additive toxicities between study agents, or known possible drug interactions between study drugs. Prior Medication: Allowed: * Treatment with quinolones, fluoroquinolones, aminoglycosides, or other agents with known or potential activity against M. tuberculosis. Exclusion Criteria Co-existing Condition: Patients with the following conditions or symptoms are excluded: * Current active tuberculosis (confirmed or suspected). * Sensitivity or intolerance to study medication. * Acute hepatitis. * Evidence of peripheral neuropathy, i.e., signs or symptoms of paresis, paresthesias, neuromotor abnormalities, or neurosensory deficits of grade 3 or worse. * Inability to have concomitant medications changed to avoid serious interaction with study drug. Concurrent Medication: Excluded: \- Quinolones, fluoroquinolones, or aminoglycosides with antituberculous activity (may be used for up to 14 days for treatment of intercurrent infection).Other agents with known or potential antituberculous activity should be avoided, including the following: * Aminosalicylic acid salts, capreomycin, clofazimine, cycloserine, ethambutol, ethionamide, isoniazid, kanamycin, pyrazinamide, rifabutin, rifampin, streptomycin, and thiacetazone. Prior Medication: Excluded: * History of treatment for \> 2 months with agents that have known or potential antituberculous activity other than those specifically allowed. Agents with potential or known antituberculous activity include the following: * Aminoglycosides such as amikacin, aminosalicylic acid salts, capreomycin, ciprofloxacin, clofazimine, cycloserine, ethambutol, ethionamide, isoniazid, kanamycin, ofloxacin, pyrazinamide, quinolones or fluoroquinolones, rifabutin, rifampin, streptomycin, and thiacetazone. Patients may not have: * Current active tuberculosis. * Acute hepatitis. * Peripheral neuropathy of grade 3 or grade 4. Willing and able, in the clinician's opinion, to comply with the treatment and clinical management issues.