Abstract
The past two decades have witnessed an increase in the number of patients who are immunocompromised as a consequence of a primary or secondary immunodeficiency disorder or from the use of agents that depress one or more components of the immune system. Broadly defined, an immunocompromised host has an alteration in phagocytic, cellular, or humoral immunity that increases the risk of an infectious complication or an opportunistic process such as a lymphoproliferative disorder or cancer.1 Patients may also be immunocompromised if they have an alteration or breach of their skin or mucosal defense barriers that permits microorganisms to cause either . . .