i 4 8 



TROPICAL MEDICINE AND HYGIENE 



some observers, may be produced. Unfortunately man 

 is not the only animal capable of being infected, and in 

 Rhodesia many of the wild game harbour the human 

 trypanosomes and serve as the "reservoir" from which 

 the flies derive their infection and in turn infect man. 



FIG 44. 



Even in Uganda, months and years after the population 

 had been removed from the shores of Victoria Nyanza, the 

 flies there were still infective. 



Prophylaxis amongst Europeans is comparatively 

 simple. Districts where sleeping sickness is prevalent 

 should be avoided as much as possible. European 

 habitations should not be near water nor placed where 



