[Experimental and clinical pulmonary pneumocystosis].

Rat lungs with hydrocortisone-induced pneumocystosis and a necropsy material from 5 patients with AIDS were studied light- and electron-microscopically. The identity of basic morphological features of lung pneumocystosis development in experiment and humans is demonstrated. Three main periods--latent, pronounced, terminal (pneumocystic pneumonia) are distinguished taking into account the relation of productive and vegetative forms of Pneumocystis carinii, state of the surfactants, type I alveolocytes and inflammation cells.