Which of the following is a common presentation of tuberculosis (TB)?

A persistent cough is indeed a common presentation of tuberculosis (TB). This symptom typically develops when the infection affects the lungs, which is the primary site for pulmonary TB. The cough is often initially non-productive but can become more severe and may produce sputum as the disease progresses. The chronic nature of this cough, lasting three weeks or longer, is particularly indicative of TB and helps distinguish it from other respiratory infections.

In TB, the cough may also become accompanied by hemoptysis (coughing up blood), especially in more advanced cases. Early identification and treatment of this symptom are critical in managing the spread of TB and preventing complications. The presence of a persistent cough is a cornerstone symptom that warrants further evaluation, particularly in individuals with risk factors for TB.