A 40 year old patient came to OPD with complaint of fever, pleuritic chest pain, productive cough and painful vesicles around the lips. Exam: temp 38C. He has a history of splenectomy last year. What is the single most likely causative organism?

The key is A. Pneumococcal pneumonia. [Pneumococcal pneumonia is most common pneumonia in splenectomized patient. Painful vesicles around the lips is well known association of pneumococcal pneumonia. Also pleuritic chest pain and productive cough are present in pneumococcal pneumonia].