Gr. H. F. Nuttall and S. Hadwen 
243 
Temp.'F. 
°/oOf 
morning & 
infected 
Day 
evening 
r.b.c. 
33 
102 6 
No parasites found, examined once daily 
0 
105-0 
34 
104-6 
1 infected r.b.c. found, 1 (O) ... 
+ 
105-0 
35 
104-2 
No parasites. Cow much emaciated 
0 
101-2 
36 
104 0 
105-2 
37 
102-8 
104-8 
38 
104-0 
104-8 
(29. vi. 09) 39 
104-0 
Observations ceased. 
Record of Heifer 182. 
Although Heifer 182 does Dot belong to the series of cows which 
served for our experiments, we have decided to include its record 
because of its interest. The animal died from piroplasmosis, a very 
high percentage of infected corpuscles (58'2 °/ 0 ) being found on the day 
when it died. We are indebted to Mr J. R. Jackson for the clinical 
notes of the case and our thanks are due to Mr W. G. Wragg for 
allowing us to examine a series of blood-films taken from this animal. 
In the following table we in each instance counted 500 corpuscles to determine the 
percentage of infected r.b.c. In the blood-film taken on the 11th day we counted 100 
parasitized r.b.c., in the other films we counted 200 parasitized r.b.c. to determine the 
percentages of the different forms of parasites contained in the corpuscles. 
Temp. °JF. 
morning & 
Day evening 
(13. ii. 09) 
1 
— 
Inoculated with defibrinated blood of Heifer 108 ( 
see p. 
237). 
9 
103-0 
%of 
infected % 
r.b.c. (O) 
°/o °/o 
(PP) (D) 
10 
104 d) 
Parasites appeared, 1 (PP) observed 
+ 
• 
+ 
104-0 
11 
103 0 
Parasites increasing 
0-2 
64 
36 ? 
104-0 
12 
104-0 
Parasites increasing 
2-0 
68 
24 8 
106-0 
13 
106-0 
Cow not feeding. Haemoglobinuria 
7-4 
70 
22-5 7-5 
105-0 
(26. ii. 09) 
14 
107-0 
Heavy infection. Heifer died at 12.30 p.m. 
58-2 
75 
19 '5 5-5 
106-4 
The autopsy made on the day after death revealed the typical appearances of animals 
which have died of Red water. 
16—2 
