THE patient described below appears to represent the first survival of acute pulmonary mucormycosis treated with amphotericin B in which the infection was eradicated without surgical intervention.1 In this case amphotericin B sensitivity testing was performed in a manner more physiologic than any previously described, and a rational treatment regimen for this infection was instituted.2 Case ReportL.S., a 63-year-old man under treatment with prednisone and chlorambucil for acute lymphocytic leukemia, was admitted to Barnes Hospital on November 7, 1970, with a 2-day history of shortness of breath, cough and fever. On admission, physical examination was within normal limits except . . .