This symposium was first published in French. The material is covered in four parts: (1) the biology of group A hemolytic streptococci, (2) the epidemiology of infection with group A hemolytic streptococci, (3) the epidemiology of rheumatic fever, and (4) the prevention of rheumatic fever. Neither the diagnosis nor the treatment of rheumatic fever were dealt with at this conference. The papers are well illustrated, comprehensive references are listed, and the material is presented cohesively. The editors have accomplished their goal in presenting the English version of the conference. The monograph should serve a useful purpose for those interested in the epidemiology and prevention of rheumatic fever.