Preface 



THIS MANUAL is bascd upon the author's laboratory not^s 

 that have been in use in an emergency course offered 

 at the University, in which the detection and identification 

 of protozoan parasites of man and simple microscopical 

 technique employed for this purpose, are studied and 

 practised. There are now available several excellent trea- 

 tises on parasitic protozoa of man which deal comprehen- 

 sively with the morphological and developmental details, 

 incidence of infections, geographical distribution, patho- 

 logical changes brought about on human body, diagnosis, 

 treatment, etc. As no one of these meets the need of the 

 class, the present manual has been prepared. It contains 

 onh' the essential information in order to serve as a practi- 

 cal guide or companion book in detecting and identifying 

 the human protozoa. 



The text has been compiled from the materials which 

 have been accumulated bv the author in the last twenty- 

 five years. In addition, the author has consulted the works 

 of Mr. C. Dobell, Dr. R. P. Strong, Dr. C. M. Wenyon, and 

 manv others, to whom he expresses his indebtedness. To 

 supplement the descriptions in the text, a number of origi- 

 nal drawings which have been especially prepared for this 

 work, are inserted. Except the living specimens, all draw- 

 ings were made with the aid of a drawing apparatus under 

 an oil immersion objective, and depict precisely as the 

 specimens appeared under the microscope. The author is 

 under obligation to the authors of papers that contain the 

 illustrations from whicli all or parts of figures 7, 8, 14, 15, 



