(x. H. F. Nuttall and S. Hadwen 
171 
Control Dogs VI and VII. 
These dogs served as controls to Dogs 6 and 7 which were treated 
with Trypanblau and recovered. Both of the control animals had been 
treated with blood containing dead P. canis in the hope of producing 
immunity in them. They were both inoculated with virulent blood 
nine days after the last injection with blood containing 
lg dead P. canis. 
(15. iv. 09.) Dog VI. 
(15. iv. 09.) Dog VII. 
Day 
1. Inoculated with 5 c.c. of virulent blood. 
6. Parasites appeared in its blood. 
8. Dog died of piroplasmosis. Haemoglobinuria. Many para¬ 
sites were present, 29 % of the r.b.c. being infected. 
Day 
1. Inoculated with 5 c.c. of virulent blood. 
6. Parasites appeared in its blood. 
8. 5 °/o of r.b.c. infected. 
9- 14% „ 
10. 5 % ,, ,, ; haemoglobinuria, very weak. 
11- 2% „ 
12. Few parasites. 
13. 0-8 % of r.b.c. infectedj very anaemic. 
29. Had gradually picked up during the intervening days there 
being no parasites on some days, few on others. At one 
time they were absent for a period of 9 days (days 21-28). 
The dog seemed to be recovering when the parasites 
reappeared on the 29th day. 
30. 1 % of r.b.c. infected. 
31-32. Few infected r.b.c. at film-edge. 
33. 2 % of r.b.c. infected. 
34. 1% „ 
35. 05% „ 
(20. v. 09.) 36. — Dog died of chronic piroplasmosis. 
Note: —The full account of Dog VII will be found in the protocols accompanying the 
paper by Nuttall and Graham-Smith which will appear in the next number of Parasitology. 
Control Dog VIII. 
Day 
(29. III. 09.) 1. 
Large mongrel collie. Weight 39J lbs. 
Inoculated with 5 c.c. of heart blood. 
°/o of 
The infected 
r.b.c. 
contained 
infected 
parasites as follows 
r.b.c. 
, - 
Temp. 
(1000 
% 
% 
% 
°/o 
°/o 
% 
° F. 
counted) 
P 
D 
0 
pp 
OO I 
’PPP 
4. 
Parasites appear in blood, 
— 
+ 
0 
0 
0 
+ 
0 
0 
very few at film-edge 
5. 
5 5 11 11 11 
104-4 
+ 
0 
2 
60 
35 
1 
2 
6. 
Parasites increasing 1 a.m. 
— 
0-6 
1 
4 
64 
30 
0 
1 
3 a.m. 
104-5 
0-4 
0 
3 
54 
43 
0 
0 
6 a.m. 
104-5 
1-0 
0 
1 
61 
37 
0 
1 
9.15 a.m. 
105-2 
9.45 a.m. 
— 
2-0 
0 
2 
56 
42 
0 
0 
1.15 p.m. 
105-4 
1-2 
0 
1-5 
49 
46 
1 
1-5 
4 p.m. 
— 
2-8 
3 
4 
41 
50 
1 
1 
iv. 09.) 7. 
Parasites increasing. 
Haemoglobinuria 11.30 a.m. 
105-1 
17 
1 
2-5 
63-5 
30 
2 
1 
Dog moribund, killed 6 p.m. 
104-7 
28 
0 
5 
53 
41 
•5 
•5 
Note : — The 
sign + indicates that there were too 
few infected corpuscles 
present to 
(4- 
permit of a determination of their percentage. 
