PATHOGENIC TRYPANOSOMES AND GAME 



509 



infection), and T. tragelaphi. The animals harbouring trypanosomes 

 included bush buck, water buck, puku, impala, sitatunga, eland, and 

 duiker. Duke (1913a) also found that a considerable percentage of the 

 wild game in West Uganda is infected with trypanosomes (T. hrucei, 

 T. congolense, T. vivax, T. uniforme, and trypanosomes having a " sus- 

 picious resemblance to T. gambiense'^). Similar results were obtained by 

 Kleine and Fischer (1911), R-odhain, Pons, Vandenbranden, and Bequa?rt 

 (1912, 1913a), Taute (1913), Week (1914), and others. 



The following table given by Bruce and his co-workers (1913e) shows 

 the results of the examination of wild animals in Nyasaland: 



Eland 



Sable 



Water buck 



Koodoo 



Bush buck 



Hartebeest 



Eeed buck 



Oribi 



Duiker 



Buffalo 



Lion 



Hyjena 



Elephant 



Wart hog 



WUd cat 



Porcupine 



Total 



180 



59 



14 



26 



20 



The possibility of the existence of a reservoir of T. gambiense in game 

 and other animals will be discussed below. The evidence that any such 

 reservoir exists is not at all clear. As regards the other trypanosome of 

 man in Africa, which appears to be merely a strain of T. brucei, but which 

 is usually referred to as T. rhodesiense, the position is a difficult one. In 

 areas where the disease nagana of domestic animals is common, and the 

 human disease due to this strain of T. brucei is absent, all observers are 

 agreed that the trypanosome of this type in the game is T. brucei. In 

 areas in which the human disease occurs opinions differ. In Nyasaland 

 the Royal Society's Commission under Bruce (1913 to 1914) concluded 

 that the trypanosome in man, domestic animals, and game was identical, 

 and called it T. brucei vel rhodesiense. Kinghorn and Yorke (1912 

 to 1913) in North Rhodesia referred to the trypanosome in man as 



