212 Trypanosome causing Disease in Man in Nyasaland. 



Table X. — The Percentages of Eecoveries in Various Animals infected with 

 the Human Strain of the Trypanosorne causing Disease in Man in 

 Nyasaland. 





Ox. 



Goat. 



Monkey. 



Dog. 



Rabbit. 



Guinea- 

 pig- 



White 

 rat. 



Percentages ... 



80 



























No. of animals 

 employed 



5 



29 



20 



25 



7 



15 



21 



Comparison of the Wild-game and Wild Glossina morsitans Strains 

 . with the Human Strain of the Trypanosome causing Disease in 

 Man in Nyasaland. 



Table XI. — The Average Duration, in Days, of the Wild -game, Wild Glossina 

 morsitans and Human Strains of the Trypanosome causing Disease in 

 Man in Nyasaland, in regard to their Virulence towards Various 

 Animals. 



Struin. 



Ox. 



Goat. 



Monkey. 



Dog. 



Rabbit. 



Guinea- 

 pig- 



White 

 rat. 



Human 



134 



42 



26 



34 



28 



• 



67 



30 



Wild-game 





46 



38 



41 







32 



Wild &. morsitans 



Bee. 



54 



38 



29 



47 



81 



26 



Table XII.- — The Percentages of Eecoveries in Various Animals of the Wild- 

 game, Wild Glossina morsitans and Human Strains of the Trypanosome 

 causing Disease in Man in Nyasaland. 



Strain. 



Ox. 



Goat. 



Monkey. 



Dog. 



Rabbit. 



Guinea- 

 pig- 



White 

 rat. 



Human 



80 























:®W 



Wild-game 





















wj 



Wild O. morsitans 



100 



6 



7 



4 















Conclusions. 



1. The pathogenic action on various animals of the Human strain, the 

 Wild-game strain and the Wild G. morsitans strain is so much alike, that it 

 may be concluded that they all three belong to the same species of 

 trypanosome. 



2. This species is T. brucei vel rhodesiense, the trypanosome causing disease 

 , man in Nyasaland. 



