44 
Trypanosomiasis of Camels 
(a) Mice. These animals proved very susceptible to infection. As in the 
case of Trypanosoma evansi, however, the course of the infection shows certain 
peculiarities. After being inoculated the trypanosomes appeared in the 
circulation of the mouse in a few days, but soon afterwards disappeared for 
a certain period. Later as a general rule they reappear, but in certain cases 
the blood remains free from parasites. Nevertheless such blood is infective 
as maybe shown by sub-inoculations, and moreover the spleens of such animals 
are always hypertrophied. The following are records of the course of the 
infection in certain mice: 
Mouse of 5th passage: infected on 29 April. 
May 2 Trypanosomes appeared in the blood (+ v.f.)*. 
,, 3—6 — +. 
„ 6-9 = 0. 
„ 10 = (+ v.f.). 
„ 11 = +• 
12 =++. 
13 = + + +. 
14-15 = +. 
16 = + + +. 
17 = + + + + (killed). 
99 
Mouse No. 2. Infected from guinea-pig on April 2nd. 
April 3-15 = 0. 
,, 10 = (+ v.f.). 
„ 17 = 0. 
„ 18 - ( + v.f.). 
April 19-May 19-0. Observation interrupted. 
Mouse No. 3. Infected from the same source as mouse No. 2 on April 2nd. 
April 3-15 = 0. 
„ 16 = + f. 
April 17-May 20 = 0. 
May 20 died. Spleen very hypertrophied. 
Similar results are obtained by inoculating mice with infected blood 
from larger animals in which the infection is chronic. 
Mouse No. 30. Inoculated subcutaneously from a calf (trypanosomes present in the 
blood of the calf), October 7th. 
Oct. 8-21 = 0. 
„ 22 = (+ v.f.). 
„ 22-26 = 0. 
„ 27,28 = ( + v.f.). 
„ 29 = 0. 
,, 30 = (+ v.f.). 
„ 31 = 0. 
Nov. 1 = +. 
* v.f. =very few: f. =few. 
