How long does tuberculosis treatment typically last?

• A. About one week
• B. About three days
• C. About six months
• D. About one year

Answer: (C)

Tuberculosis treatment is long because the bacteria grow slowly and can hide in tissues, so you need a duration that clears both actively dividing bacilli and dormant organisms to prevent relapse and resistance. For drug-susceptible TB, the standard plan lasts about six months: an initial intensive phase of roughly two months with four drugs to rapidly reduce bacterial load, followed by about four months of continuation with two drugs to finish eradicating the infection. Shorter courses—such as a week or a few days—would not be sufficient to clear TB, and a full year is longer than usual unless special circumstances exist, like drug-resistant disease which requires a different, longer treatment strategy.