A TEXTBOOK OF 



B ACT E R I OLOG Y 



A PRACTICAL TREATISE FOR STUDENTS 



AND PRACTITIONERS OF MEDICINE 



AND PUBLIC HEALTH 



BY 



HANS ZINSSER, M.D. 



PROFESSOR OF BACTERIOLOGY, COLLEGE OF PHYSICIANS AND SURGEONS, COLUMBIA UNI- 

 VERSITY, NEW YORK CITY; BACTERIOLOGIST TO THE PRESBYTERIAN HOSPITAL; 

 FORMERLY PROFESSOR OF BACTERIOLOGY AND IMMUNITY, STANFORD 

 UNIVERSITY, CALIFORNIA; COLONEL MEDICAL OFFICERS' ' ' 



RESERVE CORPS, U. S. A. Y * ( 



WITH A SECTION ON PATHOGENIC PROTOZOA 

 BY 



FREDERICK P. RUSSELL, M.D. 



BRIGADIER GENERAL, MEDICAL OFFICERS' RESERVE CORPS, U. 8. A., FORMERLY 



PROFESSOR OF BACTERIOLOGY AND PATHOLOGY, ARMY MEDICAL 



SCHOOL AND GEORGE WASHINGTON UNIVERSITY 



(Completely revised and rewritten from the original text 

 of Hiss and Zinsser) 



WITH ONE HUNDRED AND SIXTY-FOUR ILLUSTRATIONS 

 IN THE TEXT 



FIFTH EDITION 



D. APPLETON AND COMPANY 



NEW YORK :: 1922 :; LONDON 



