The source of transmission for tuberculosis mainly comes from patients with active pulmonary tuberculosis, also known as bacterium-shedding patients. This is determined when tuberculosis bacteria are found in the patient's sputum. Tuberculous pleurisy, commonly referred to as tuberculous pleurisy, is not contagious. This is because the pleural effusion is confined within the pleural cavity, isolated from the external environment, and the chances of detecting tuberculosis bacteria in the pleural fluid are very low. Therefore, it is generally not contagious and there is no need for concern. The treatment duration for tuberculous pleurisy is longer than that for pulmonary tuberculosis, typically lasting 9 to 12 months. It is important to follow medical advice and complete the course of anti-tuberculosis treatment.