Table 7. — Dogs infected with the Rhodesian strain 
Description of 
animal 
Amount of virus 
injected subcutaneously 
or intraperitoneally 
Day on 
which 
parasites 
were first 
seen in 
blood 
Day on 
which 
death 
occurred 
Remarks 
1. Mongrel. 
Weight, 5 too g. 
Intraperitoneally. 1 c.c. 
of diluted blood solu¬ 
tion containing 1000 
trypanosomes per c.mm. 
4th day 
9th day 
Parasites present in large 
numbers. Posterior 
nuclear varieties seen. 
Weight at time of death, 
+3°° g- 
2. Irish terrier. 
Weight, 12,050 g. 
Intraperitoneally. t c.c. 
of diluted blood solu¬ 
tion containing 250 
trypanosomes per c.mm. 
Sth „ 
«3th „ 
Parasites present in large 
numbers. Posterior 
nuclear forms seen. 
Weight at time of death, 
10,460 g. 
3. Collie 
Weight, 7950 g. 
Intraperitoneally. 1 c.c. 
of diluted blood solu¬ 
tion containing 500 
trypanosomes per c.mm. 
4th „ 
«3 th n 
Parasites 10 to a field on 
the sixth to ninth days. 
Subsequently they were 
scanty. No posterior 
nuclear forms found. 
Weight at time of death, 
7 r 5° g- 
4. Spaniel. 
Weight, 17,090 g. 
n » 
4th „ 
12th „ 
Parasites scanty. No 
posterior nuclear forms 
seen. 
Weight at time of death, 
15,020 g. 
T. gambiense. Two experiments. In both animals the disease 
ran a chronic course. Parasites were, as a rule, only found in small 
numbers. Incubation period, twelve to sixteen days; average 
fourteen. 
Table 8 . — Dogs infected with T. gambiense 
Description of 
animal 
Amount of virus 
injected subcutaneously 
or intraperitoneally 
Day on 
which 
parasites 
were first 
seen in 
blood 
Day on 
which 
death 
occurred 
Remarks 
i. Irish terrier. 
Weight, 9500 g. 
Intraperitoneally. 1 c.c. 
of diluted blood solu¬ 
tion containing 500 
trypanosomes per c.mm. 
12th day 
64th day 
Parasites found fairly 
regularly in small num¬ 
bers. On the last two 
days trypanosomes were 
present in large numbers 
(30 to a field). 
1- Mongrel. 
Weight, 10,250 g. 
Intraperitoneally. 1 c.c. 
of diluted blood solu¬ 
tion containing 1000 
trypanosomes per c.mm. 
16th „ 
Parasites found fairly con¬ 
stantly, but usually in 
very small numbers. 
Animal still alive on 34th 
day. _ 
