Which of the following symptoms is often associated with pulmonary tuberculosis?

Night sweats are commonly associated with pulmonary tuberculosis because they are one of the classic systemic symptoms of this infection. Tuberculosis (TB) is an infectious disease primarily affecting the lungs, but it can also have systemic manifestations. Night sweats occur due to the body's response to the infection, as the immune system works to fight off the mycobacterium that causes TB. The combination of fever and the body’s attempt to regulate temperature can result in excessive sweating, particularly during the night when the body’s temperature may fluctuate more dramatically.

While symptoms like fever and chills, persistent headache, and fatigue can also occur with pulmonary tuberculosis, night sweats are particularly characteristic of the disease and often serve as an important clinical indicator for healthcare providers in diagnosing active TB.