42 
Trypanosomiasis of Camels 
Serum of rabbit infected with the camel trypanosomes. 
Number of minutes 
after mixture of 
trypanosomes 
and serum Observations 
1 Trypanosomes immobile. 
2 Some exhibit faint movements. 
4 Slow agglutination into small rosettes. 
5 Numerous small rosettes. 
G Ditto. 
7 Accumulation into large rosettes. 
9 Many fairly large rosettes. 
11 Rosettes moving rapidly. 
13 Trypanosomes begin to converge slowly. 
14 Many diverging. 
18, 32, 34 Ditto. 
42, 46 & 66 Ditto. 
72 Nearly all separated; immobile rosettes present. 
75 Separate individuals slightly mobile. 
79 All have separated. The remaining are immobile. 
Serum of bull infected with the camel trypanosomes. 
1 Trypanosomes agglomerating strongly. 
3 Great number of rosettes. 
14 Rosettes begin breaking up. 
20 Rosettes in some places. Many separate individuals. 
36 Only small rosettes with separate individuals remaining. 
48 All trypanosomes separated. 
From the above described results it will be seen that human serum has 
the most marked effect on the camel trypanosome and in descending order 
that of the rabbit, horse and bull. Although bovine serum agglutinates the 
trypanosomes more rapidly than horse serum, the time during which it retains 
this power is less. 
The action of the serum of animals infected with the camel trypanosome 
varies in different species. Whilst that of an infected calf acted more ener¬ 
getically than the serum of a normal animal, the serum of an infected rabbit 
although taking longer to produce agglutination maintains its action for 
a greater period than that of normal rabbits. 
Anti-anthrax horse serum. 
Number of minutes 
after mixture of 
trypanosomes 
and serum Observations 
1 Trypanosomes faintly mobile. 
2 Trypanosomes more mobile. 
3 Accumulation into groups of 3-5 individuals. 
5 Small rosettes. 
6 Large rosettes. 
10 Rosettes diverging, sometimes rapidly, sometimes slowly. 
11 In some places small rosettes. 
