64 



I'lIKSIDKXIlAL ADDUKSS SKCTIOX D. 



SOME .MODKIJN DEVELOPMENTS IN ANIMAL 



rAlLVSITOLOGY. 



r.Y 



Anxir Pokter, D.Se. Lond., F.E.S.S.Af., F.L.S. 



Para.sitoJogist, SoutJi African Institute for Medical Rescarcli. 



.J(>Jianne>ihiir<j^ and Senior Tjcrfurer in Parasitology ^ J' )iiversiiii of 



llie ]\ itiriitcrxrand. 



Presidential Address to Section D, delivered Juhj \'l, 1922. 



Contents. 



Introdvcj ion- 

 Protozoology : 



Amoebiasis 



Trypanosomiasis 



Herpetonioiiiases and Leishmaniases ... 



Natural Heipetomoniasis of Vertebrates 



Flagellates and Flagellosis of Plants ... 



Intestinal Flagellates 



Neuromotor Apparatus in Protozoa ... 



Sporozoa 



Yellow Fever and Infectious Jaundice 



Rickettsia Bodies ... 



Heljiinthology : 



Schistosomiasis 



Clonorchiasis 



Paragonimiasis 



Metagonimiasis 



Some other Fluke Infections ... 



Ancylostomiasis 



Ascariasis 



Strongyloides Infections ... 



Arthropods as Transmitters of Disease ... 



Some Sociologicvl Aspects 



Page. 

 64 



67 

 67 

 6b 

 72 

 72 

 74 

 75 



75 

 76 



80 

 82 

 83 

 84 

 86 

 87 

 8S 



91 



IXTRODUCTION. 



Before commencing; itjy Presidential Address to Section D. 

 may I express my appreciation of the honour conferred on me in 

 being thus chosen to address you. In selecting as my subject 

 that of Animal Parasitology, it may appear that I am hardly in 

 full agreement with my predecessor when he stated that 

 Science pursued for its own sake widens the outlook of the 

 individual and trains his rea.soning powers. ' Pure science ' must 

 never be ignored, for the apparently academic and * useless 

 researches of to-day may be of the greatest technical benefit to- 

 morrow.'" With tliis opinion, however, I desire to identify my- 

 self to the full, for the pursuit of knowledge for its own s.-ikc 



