Prior to starting antitubercular medications, which study is routinely completed to assess the disease and plan therapy?

• A. Complete blood count
• B. Positive sputum culture
• C. X-ray
• D. Culture and sensitivity

Answer: (C)

A chest X-ray is routinely done before starting antitubercular therapy because it gives an immediate, practical snapshot of how TB has affected the lungs. It shows the extent and pattern of disease—such as upper‑lobe involvement or cavities—which directly informs prognosis and helps plan how intensive the treatment should be and how closely the patient should be monitored. This imaging baseline is available quickly and guides decisions about hospitalization, follow-up intervals, and response assessment as therapy begins.

Sputum culture and culture with sensitivity are crucial for confirming TB and, when needed, guiding drug choices—especially if resistance is suspected—but they take time and aren’t the primary tool used to gauge disease burden or to plan the initial management. A CBC is not the key piece used to map the disease or shape the therapy plan.