CONTENTS 



CHAPTER PAGE 



I Introduction i 



Robert Hegner, Johns Hopkins University School of Hy- 

 giene and Fxihlic Health 



II Host-Parasite Relations Between Animals and Their 



Protozoan Parasites 4 



Robert Hegner 



III Ectoparasitic Protozoa ii 



B. D. Reynolds, University of Virginia . 



IV Recent Considerations Concerning the Intestinal 

 Protozoa of Monkeys 27 



John F. Kessel, University of Southern California 



V The Protozoa of Termites 32 



Harold Kirby, Jr., University of California 



VI The Protozoa of the Alimentary Tract of Domestic 



Ruminants and the Horse 49 



Elery R. Becker and T. S. Hsiung, Iowa State College 



VII Coprozoic Protozoa 59 



Justin Andrews, Johns Hopkins University School of 

 Hygiene and Public Health 



VIII The Cultivation of Intestinal Protozoa 66 



Harvey P. Barret and Nannie M. Smith, Charlotte, N. C. 



IX Transmission of Intestinal Protozoa 73 



Robert Hegner 



X Methods and Problems of Cross-Infection Experi- 

 ments with Intestinal Protozoa of Man and of 

 Certain Laboratory and Domestic Animals ... 85 

 John F. Kessel 



XI Effects of Changes in the Diet of the Host on 



Intestinal Protozoa 106 



Herbert Ratcliffe, University of Pennsylvania 



XII The Role of Bacteria in the Cultivation of Intes- 

 tinal Protozoa 112 



Herbert Ratcliffe 



vii 



