Table 1. Presentation of AIDS-associated Pneumocystis carinii In addition to a significant decrease over time in the overall pneumonia at autopsy at the University Hospital of Frankfurt/Main, prevalence of P. carinii pneumonia at autopsy, these observations

* Characterized by signs of acute alveolar damage, sparse interstitial infil1. Case Records of the Massachusetts General Hospital. Case 27-1997. N Engl trates of predominantly mononuclear origin, and typical foamy intraalveolar J Med 1997;337:619–27. exudate containing numerous cyst forms of the organism. 2. Lyon R, Haque AK, Asmuth DM, Woods GL. Changing patterns of infec† Characterized by signs of chronic alveolar damage with interstitial and/or tions in patients with AIDS: a study of 279 autopsies of prison inmates intraalveolar proliferation of fibroblasts, interstitial mononuclear infiltrates, and and nonincarcerated patients at a university hospital in Eastern Texas, foamy exudate with cyst forms. 1984–1993. Clin Infect Dis 1996;23:241–7. ‡ Characterized by mostly areactive tissue necrosis, cavitation, or honey-