This book is an official record of the proceedings of the Fifth National Medical Congress of Argentina. It contains the scientific papers presented. "The Epidemiology of Amebiasis," by Salvador Mazza, is a good general review of the subject. Dr. Marino R. Castex and Dr. Daniel Greenway presented a paper covering the parasitology and clinical findings in 2,700 cases of intestinal amebiasis. Dr. David Staffieri read a complete and excellent paper on the extra-intestinal lesions and locations of the ameba, discussing in detail the symptoms, clinical course, pathologic features and treatment of all the varieties of amebiasis other than intestinal. A paper entitled "Surgery and Amebiasis" was read by Dr. R. A. Marotta. Other papers presented include "Surgical Possibilities in the Treatment of Spastic Paralysis," by Dr. Manuel B. Ansart; "Filtrable Virus of Psittacosis in Particular," by Dr. Thomas, and "The Respiratory Insufficiencies and the Scientific Basis for Pulmonary Collapse Therapy,"