Animal 
H. L. Duke 
Table I. 
307 
and ex- 
Strain of infecting trypanosome: 
Duration 
periment number in direct 
of disease 
number 
transmission series 
in days 
Remarks 
M 43 
Wild Hies 
63 
Medium sized animal 
M 59 
Cycle by lab.-bred dies from M 43 
409 
99 
M 63 
1 st passage, direct transmission 
79 
“.Nakabugo” species 
M 72 
1 st ,, ,, ,, 
77 
Large animal 
M 88 
2 nd ,, ,, ,, 
Alive after 
449 
Thin but active: still shows T.’s; 
large animal 
M 93 
3rd ,, n ,, 
47 
Poor conditioned animal 
M 98 
3rd ,, ,, ,, 
Alive after 
430 
Thin but active: still shows T.’s; 
medium size 
M 107 
4th ,, j» ,» 
140 
Medium size 
M 111 
5th ,, ,, ,, 
90 
99 
M 117 
6 th ,, ,, j> 
125 
Large size 
M 124 
2 nd ,, ,, ,, 
91 
Medium size 
M 142 
7 th ,, ,, ,, 
Alive after 
333 
99 
M 132 
8 th ,, ,, ,» 
254 
99 
M 140 
9 th ,, ,, ,, 
94 
Well-nourished, seemed well day 
before death; medium size 
M 147 
10 th ,, ,, 5 , 
92 
Medium size 
M 161 
11 th passage by blood inoculation 
Alive after 
225 
Medium size: since dead 
M 139 
3rd passage: cycle, lab.-breds off 88 
31 
Small, ill-nourished; T.’s 4 - + 4 - 
throughout disease 
M 160 
4th passage, direct transmission from 
Alive after 
Small size 
139 
346 
• 
M 164 
5th passage, direct transmission from 
160 ' 
Alive after 
298 
Medium size 
M 169 
12 th passage: cycle, lab.-breds off 161 
74 
“Nakabugo” species 
S 286 
Inoculated from M 88 
Alive after 
111 
S 287 
99 99 99 
Alive after 
111 
D 281 
„ „ M 59 
31 
Corneal opacity after 14 days. Few 
posterior-nuclear forms seen on 
penultimate day of disease 
D 282 
99 99 99 
40 
Corneal opacity after 14 days 
P 277 
„ „ M 88 
Alive after 
122 
Posterior-nuclear forms present 
P 278 
99 99 99 
Alive after 
122 
>» ” >> 
P 244 
„ „ M 59 
Alive after 
117 
Posterior-nuclear forms rare: since 
dead 
P 245 
99 99 99 
Alive after 
117 
Posterior-nuclear forms rare: since 
dead • 
The average duration of the disease in 12 completed monkey experiments 
with the common green species was 216 days. None of the monkeys showed 
any marked symptoms, and somnolence was only noticeable in the very late 
stages. 
The white-nosed Cercopithecus, known locally as “nakabugo,” is much 
less robust in captivity than the green monkey; in infected monkeys of this 
