70 
Trypanosomiasis of Camels 
Table 11 ( continued ). 
Mouse No. 13. Infected with trypanosomes from donkey. 
Days 
Number of 
leucocytes 
Trypano¬ 
per 1 cub. mm. 
somes 
— 
14,916 
— 
— 
14,662 
— 
1 
— 
— 
2 
16,953 
0 
3 
18,785 
+ 
4 
12,574 
+ + 
5 
8,247 
+ + + 
6 and 7 
— 
+ + + 
8 
16,851 
+ + + 
9 
10,600 
+ + + 
10 
14,254 
+ + + + 
11 
— 
— 
Notes 
Infected from rat No. 2 
Succumbed 
In the first case the trypanosomes appeared in the blood on the 5-6th 
day after infection, and in the second case on the third day. The two mice 
infected with the trypanosome from camels lived respectively 9 and 14 days 
after inoculation, and the two infected with the trypanosome from donkeys, 
4 and 10 days after inoculation. 
The number of trypanosomes in the circulation increased progressively 
each day and on the day before death reached the maximum of (+++ + ). 
The red blood corpuscles decreased in number after infection, and on the 
last day of life were respectively 3T8 and 3T6 % of the total number. Also 
in mice, more than in any other animals (except rats), are expressed the 
qualitative changes of the red blood corpuscles: normoblasts , polychromato- 
philia ; and poikylocytosis . 
The changes in the total number of leucocytes were especially sharp in the 
mouse infected with the trypanosomes from the camel. 
Before infection the average of these elements was: 
(1) in animal infected with trypanosomes from camel 19,930, 
(2) „ „ „ „ donkey 14,789. 
In the first mouse the curve of leucocytes descended slightly after infection, 
but on the day preceding the appearance of trypanosomes in the blood it 
rose to the high figure of 43,222. On the next day the curve fell below the 
mean and later the number of these elements remained equal to nearly half 
the average number (slightly above 10,000). On the day before death the 
curve showed a tendency to rise (to 14,524). 
A similar picture, but not so sharply expressed, was present in a mouse 
infected by the trypanosomes from donkeys. 
On the day after infection and on the day preceding the appearance of 
trypanosomes in the blood, the curve rose from 14,789 to 16,953 and on the 
day of the appearance of the parasites in blood it showed 18,785. Later the 
