HIV Patients P.carinii used to be the most common cause of pneumonia in HIV patients, however now it is bacterial pneumonia [Chest 120: 1888, 2001]. CMV, mycobacterium, and MAI can also cause pneumonia in this population. Most common isolates are encapsulated organisms – S. pneumoniae, H. influenza (100x the normal rate), and S. aureus [Chest […]