Medicine Pneumonia, Bronchiectasis, and Lung Abscess c76c3820 Most common cause of empyema is: A Bronchopleural fistula B Tubercular pneumonia C Bacterial pneumonia D Pleurisy High-Yield Explanation Ans. is 'c' Bacterial pneumonia .Causes of empyema in decreasing order of frequency.Bacterial pneumoniaT.B. pneumoniaBronchiectasisLung abscess