The initial phase duration for active TB treatment is typically:

The initial phase duration for active TB treatment is typically:

• A. 8 weeks to 3 months
• B. 6 months
• C. 1 year
• D. 2 weeks

Answer: (A)

In TB treatment, the first, intensive phase is aimed at rapidly killing actively multiplying bacteria and reducing contagiousness. This phase typically lasts about two months, commonly eight weeks, and can sometimes be extended up to about three months if the response is slower or sputum conversion is not yet confirmed. The standard continuation phase follows for about four months, delivering a usual total course of six months for drug-susceptible TB. Therefore, eight weeks to three months correctly describes the initial phase duration. The total six-month regimen refers to the entire course, not just the initial phase, while a much shorter period like two weeks would be insufficient to effectively reduce bacterial load.

In TB treatment, the first, intensive phase is aimed at rapidly killing actively multiplying bacteria and reducing contagiousness. This phase typically lasts about two months, commonly eight weeks, and can sometimes be extended up to about three months if the response is slower or sputum conversion is not yet confirmed. The standard continuation phase follows for about four months, delivering a usual total course of six months for drug-susceptible TB. Therefore, eight weeks to three months correctly describes the initial phase duration. The total six-month regimen refers to the entire course, not just the initial phase, while a much shorter period like two weeks would be insufficient to effectively reduce bacterial load.