35 « 
T. gambiense. Eight experiments. The disease was chronic. 
Parasites were only occasionally found in the peripheral blood, and 
always in very small numbers. Incubation, five to nineteen days; 
average twelve days. In one animal parasites were never found in 
the blood during the whole course of the disease. It presented the 
usual symptoms of infection, viz., oedema, loss of hair, 
muco-purulent discharge from nose and eyes, etc. Duration, sixty 
days to more than five months. 
I'able 4.—Rabbits infected with 7. gambiense 
Day on 
which 
Day on 
-Amount of virus 
parasites 
which 
injected subcutaneously 
were first 
death 
Remarks 
or intraperitoneally 
seen in 
blood 
occurred 
!• Intraperitoneally. 1 c.c. of 
diluted blood solution con¬ 
taining 5000 trypanosomes 
per c.mm. 
2 ■ Intraperitoneally. 2 c.c. of 
diluted blood solution con¬ 
taining 10,000 trypanosomes 
per c.mm. 
3 - Intraperitoneally. 1 c.c. of 
diluted blood solution con¬ 
taining 1000 trypanosomes 
per c.mm. 
5 - Intraperitoneally. 1 c .c. of 
diluted blood solution con¬ 
taining 10,000 trypanosomes 
per c.mm. 
6- Intraperitoneally. 1 c .c. of 
diluted blood solution con¬ 
taining 1000 trypanosomes 
per c.mm. 
5th day 
125th day Parasites only occasionally found. 
and always scanty. 
9 th „ 
15th 
7th „ 
19th 
*5th „ 
60th 
140 th 
109th 
Parasites never found in blood. 
It presented the usual signs of 
disease. 
Parasites rarely found, and only 
in very small numbers. 
Animal alive after five month;. 
It presents marked symptoms 
of disease, e.g., loss of hair, etc. 
Parasites rarely present m 
blood. 
Animal alive after three months- 
Parasites occasionally found in 
small numbers. 
Animal alive after 64 days. J 
sites rarely found, and ' e • 
scanty. 
Parasites have not yet been fowj 
in blood. Animal p^ec 
normal after 23 days. 
