12th January 2024

A 73-year-old patient who was born in Romania presents with a month-long history of productive cough, weight loss and fever.

A 73-year-old patient who was born in Romania presents with a month-long history of productive cough, weight loss and fever. A diagnosis of active TB is suspected. Which of the following is the most important diagnostic investigation?

Select the SINGLE most appropriate option from the list below. Select ONE option only.