Community-acquired pneumonia in immunocompromised patients - Opportunistic infections to consider in differential diagnosis

Differential diagnosis can be extensive in immunocompromised patients who present for evaluation of apparent community-acquired pneumonia. In addition to the usual pathogens seen in the general population, many opportunistic organisms of widely differing classes may require consideration. Here, the authors have chosen to focus on four pathogens that may be overlooked in the primary care setting. Epidemiologic, clinical, and therapeutic points are highlighted.