In this third edition of "Communicable Diseases," the content has been enlarged, the number of collaborating authorities has been increased, and five new chapters have been added. Among the latter, those on sulfonamides and antibiotics, dealing entirely with therapeutic agents, are informative and valuable additions. The chapters on virus hepatitis and primary atypical or virus pneumonia have been entirely rewritten in the light of the newer knowledge of these diseases. The hemolytic streptococcal infections are presented in detail, with specific treatment, and their important relation to rheumatic fever and control of the same are discussed.
On the basis of the present concept of immunity in influenza, types A and B are considered as two distinct diseases. The chapter on poliomyelitis is well written and includes the Sister Kenny concept and treatment, protective vaccination, and physical therapy treatment.
Preventive medicine is given a wider application in connection with the practice of