17. Can the Glossina palpalis convey the Trypanosoma found in the Jinja Cattle, Entebbe and Abyssinian Mules to Healthy A nimals ?
The animal employed for these experiments was the monkey. The dog is quite unsuitable owing to the difficulty, already mentioned, of obtaining an animal free from anchylo- stomes. The method employed was to feed tsetse flies on an animal suffering from the above diseases and then, after varying intervals of time, to place the same cage of flies on a healthy monkey. Only the flies which had filled themselves were counted as having fed :—
Experiment 196. Monkey (Cercopithecus sp.).
F eeding tsetse flies ( Glossina palpalis J ona healthy monkey 6 hours after they had been fed on a monkey infected with the “ Jinja cattle disease.”
Date.
Number of flies fed on :—
Tryp.
Date.
Number of flies fed on :—
Tryp.
!
Infected .Healthy Monkey. Monkey.
Infected Healthy Monkey. jMonkey.
1903.
1903.
Sept.
22...
Absent.
Oct. 8...
11
8
23...
io
11
„ 9...
9
13
24...
7
13
„ io...
11
14
Absent.
25...
16
14
Absent.
„ 11...
14
16
))
26...
15
14
„ 12...
7
12
J)
27...
10
17
, . .
„ 13...
6
12
55
28...
20
12
„ 14...
12
10
>>
29...
14
9
„ 15...
10
8
30...
12
10
„ 16...
12
14
Oct.
1...
16
12
„ 17...
10
9
Present.
2...
12
11
„ 18...
t • •
» • •
3...
13
8
Absent.
„ 19...
JÏ
4...
14
9
„ 20...
. . •
5...
10
9
„ 21...
>>
6...
18
11
„ 22...
. , ,
yy
7...
9
10
...
...
Experiment 204. Monkey {Cercopithecus sp.).
Feeding flies {Glossina palpalis) on a healthy monkey 24 hours after they had been fed on a monkey infected with the trypanosomes of the “ Jinja cattle disease.”