64 
Trypanosomiasis of Camels 
Besides quantitative changes, there are also observed qualitative changes 
such as polychromatophilia and appearance of normoblasts. 
The total number of white blood corpuscles prior to infection was on 
the average 12,548 per cub. mm. On the day after infection the curve rose 
to 19,753, and on the 3rd day to 21,025. On the 4th day it descended to 
11,506, but from the day following it again began to rise and on the 7th day 
reached the maximum number of 28,255. It remained at a high level till 
the 12th day, when it began to fall, reaching 8,754 (on the 14th day). Further 
rises and falls succeeded one another, in general showing a tendency to 
decrease, but several days preceding death a tendency to rise is observed, 
which reached 20,099 on the last day. 
Thus, if we consider the curve of the white blood corpuscles, we may 
speak of three periods in the life of these elements. 
A. first period of primary leucocytosis occurring during the first days after 
infection, and during the first days of the appearance of trypanosomes in 
the blood. 
A second period (the longest) is characterized by the number of leucocytes 
being in general close to the normal with a tendency toward leucopenia. 
A third period (several days preceding death) should be called the period 
of secondary leucocytosis. 
The correlation between the white and red blood corpuscles narrows: 
Before infection 
• • • 
1 : 460 
On the 5th dav after infection 
«/ 
1 : 397 
„ Ilth 
5 5 
1 : 241 
„ 17th „ 
55 
1 : 302 
„ 21st 
55 
1 : 328 
,, 25th ,, 
55 
1 : 487 
,, 35th ,, 
55 
1 : 135 
Forms of leucocytes. Before infection the different forms of leucocytes 
were distributed on the average as follows: 
• 
Lymphocytes ... 
24-8 % 
Mononuclears ... 
2-6 
Transitionals 
4-3 
Polynuclears 
64-8 
Eosinophils 
0 
Mast cells 
0 
Tiirck’s Reizungsformen 
1-2 
Myelocytes 
• • • 
0-8 
The chief role in the change of the leucocytic formula belongs to the 
lymphocytes and neutrophil polynuclears. 
Immediately after infection the percentage of lymphocytes began to fall 
and on the 3rd day reached T3 %, but on the next day the curve began to 
