110 



Sir D. Bruce and others. Trypanosome 



Disease Set Up in Various Animals by the Trypanosome of the Liwonde Strain. 



The infection set up in the various animals by the Liwonde strain gave 

 rise to symptoms and appearances during life, and pathological changes in the 

 various organs after death, alike and similar in every way to those caused by 

 the Human strain, Wild-game strain, and ihe Wild G. morsitans strain of 

 T. brucei vel rhodesiense found in the " Proclaimed Area." 



Comparison of the Three Liwonde Strains in regard to their 

 Virulence towards Various Animals. 



Table IV. — The Average Duration, in Days, of the Disease in various 



Animals. 



Strain. 



Goat. 



Monkey. 



Dog. 



Guinea-pig. 



White rat. 



I 



48 



49 



38 



96 



39 



II 



40 



37 



22 



94 



21 



Ill 



11 



35 



22 



66 



18 



No recoveries took place among the experimental animals. 



Table V. — The Average Duration of Life, in Days, of various Animals infected 



with the Liwonde Strain. 





Goat. 



Monkey. 



Dog. 



Guinea-pig, 



White rat. 



Average duration, in days ... 



33 



41 



28 



84 



26 



Number of animals employed 



6 



6 



9 



5 



6 



Comparison of the Liwonde Strain with the Human Strain. 



Table VI. — The Average Duration of Life, in Days, of various Animals 

 infected with the Human and the Liwonde Strains. The letter E stands 

 for " refractory." 





Strain. 



Ox. 



Goat and 

 sheep. 



Baboon. 



Monkey. 



Dog. 



Rabbit. 



Guinea- 

 pig- 



White 

 rat. 



Average 



dura- 



Human 



134 



42 



E. 



26 



34 



28 



67 



30 



tion, in 



days. 





















Average 



dura- 



Liwonde 





33 





41 



28 





84 



26 



tion, in 



days. 





















