66 Glossina palpalis as a Carrier of Trypanosoma vivax. 



Experiment 1465. — Bull. 



Date. 



Flies. 



Result. 



Put on. 



Fed. 



T. gambiense. 



T. vivax. 



1909. 











August 27 



150 



90 







„ 28 



60 



35 







September 4 



7 



230 



170 







9 



30 



19 







„ 10 









+ 



„ 11 







+ 





Remarks. — Both Trypamsoma gambiensc and Trypanosoma vivax appeared in 

 the blood of this bull. 



Experiment 982. — Bull. 



Date. 





Flies. 



Result. 





















Put on. 



Fed. 



T. gambiense. 





T. vivax. 





1909. 

















September 



n 



45 



36 











12 



65 



50 













14 



110 



75 













15 



125 



95 













16 



420 



160 













19 



55 



40 













20 

















21 



115 



85 













22 



180 



145 













23 



410 



380 











»» 



24 



300 



240 











)> 

 ») 



25 

 27 



370 



230 



+ 









October 14 













+ 





Remarks. — Both Trypanosoma yambiense and Trypanosoma vivax appeared 

 in the blood of this bull. 



Coiwlusions. 



1. The Glossina palpalis on the shores of Victoria Nyanza are infected, not 

 only by Trypanosoma yambiense, but also l)y Trypanosoma vivax. 



2. What the reservoir of the virus of Trypanosoma vivax is, is unknown, but 

 the buffalo, waterbuck, iuid other antelope which live on the Lake-shore 

 should be examined. 



