A person having CD4 count of 200 presents with difficulty of breathing. The most probable diagnosis is?: (A) Tuberculosis, (B) Histoplasmosis, (C) Candidiasis, (D) Pneumocystis jiroveci
Answer is D. Pneumocystis pneumonia is the most common oppounistic infection associated with AIDS. The risk of Pneumocystis jiroveci pneumonia among HIV- infected patients rises markedly when circulating CD4+ T cell counts fall below 200 cells/L. Tuberculosis in HIV patients occur when CD4 count is 100 cells/L. Ref: Manual of Emergency Medicine edited by Jon L. Jenkins, G. Richard Braen, 2004, Page 302 ; Harrison's Principles of Internal Medicine, Volume 2, Page 1267 ; Harrison's 17th ed chapter 182