RT Book, Section A1 Martin, Stanley I. A1 Fishman, Jay A. A2 Grippi, Michael A. A2 Elias, Jack A. A2 Fishman, Jay A. A2 Kotloff, Robert M. A2 Pack, Allan I. A2 Senior, Robert M. A2 Siegel, Mark D. SR Print(0) ID 1122370457 T1 Pneumocystis Pneumonia T2 Fishman's Pulmonary Diseases and Disorders, 5e YR 2015 FD 2015 PB McGraw-Hill Education PP New York, NY SN 978-0-07-179672-9 LK accessmedicine.mhmedical.com/content.aspx?aid=1122370457 RD 2023/03/20 AB Despite widespread use of effective antimicrobial prophylaxis in susceptible immunocompromised patient populations, Pneumocystis jiroveci remains an important opportunistic pathogen. The incidence of Pneumocystis pneumonia (PCP) has decreased with the appropriate deployment of antimicrobial prophylaxis in susceptible hosts and with the advent of highly effective antiretroviral therapy (HAART) in HIV-infected individuals. PCP remains, however, an important syndrome in HIV infection in the developing world with high mortality. Pneumocystis also impacts the growing population of immunocompromised individuals following organ and hematopoietic stem cell and bone marrow transplantation, and with the broader use of immunosuppressive therapies in connective tissue, cancer, and immune disorders. The change in nomenclature this past decade, renaming of Pneumocystis carinii as P. jiroveci, reflects knowledge about the organisms responsible for this syndrome in different host species. This change has generated significant controversy among scientists, clinicians, and journal editors. Advocates and detractors alike agree that no matter the species name, Pneumocystis pneumonia or PCP should continue to be used to describe disease caused by this organism in humans.