GAME ANIMALS TO DISEASE IN AFRICA 11 
remained infective two years after the removal of the native 
population. Experiments were therefore carried out, from 
which the following conclusions were arrived at : — 
(i) It has been proved by experiment that cattle may act 
as a reservoir of the virus of sleeping sickness, and 
that healthy animals may be infected from them 
by means of Glossina palpalis. 
(ii) It has also been proved that cattle in the fly area do 
naturally harbour Trypanosoma gambiense in their 
blood and apparently remain in good health 
(‘ Sleeping Sickness Bulletin,’ No. 19, p. 236). 
It appears, therefore, that cattle are equally or more 
dangerous as reservoirs of sleeping sickness than antelope ; 
for the trypanosome of sleeping sickness has actually been 
found in their blood, which up to the present has not been done 
in the case of game animals in a state of nature. 
In the French Congo, Dr. P. Aubert thought that the 
large herds of cattle were acting as reservoirs of sleeping sickness 
in that district (‘ Sleeping Sickness Bulletin,’ No. 34, p. 78). 
In German East Africa Professor Dr. F. K. Kleine and 0. W. 
Fischer carried out a series of experiments to ascertain whether 
sheep and goats can act as reservoirs of sleeping sickness 
(‘ Sleeping Sickness Bulletin,’ Yol. 3, No. 31, p. 402). As a 
result of these experiments it was concluded that — 
(i) Sheep and goats can act as reservoirs for the virus of 
sleeping sickness, but as the interval after their 
infection increases their infectivity appears to 
diminish. (This was noticed also in the case of the 
antelopes in the Uganda experiments of the Royal 
Society’s Commission. — R. B. W.) 
It is not stated whether sheep and goats were found naturally 
infected with Trypanosoma gambiense (R. B. W.). 
With regard to trypanosomes other than human. ‘ It 
has been proved that sheep and goats and cattle can act as 
reservoirs for trypanosomes which are fatal to cattle, and that 
cattle themselves may harbour these trypanosomes without 
becoming diseased.’ (Extract from ‘ Sleeping Sickness Bulletin.’) 
Referring to a bull used for experimental purposes, which 
apparently possessed immunity, it is pointed out (‘ Sleeping 
