io THOMPSON YATES AND JOHNSTON LABORATORIES REPORT 
On June 5 an epileptiform attack occurred, he became unconscious for about ten minutes, the pupils 
were dilated, there was slight frothing at the mouth with loud stertorous breathing. 
June 6 : Another slight convulsion, the pupils were very small. These fits were the first he had had. 
Before admission to the hospital he had been taking tabloids of some arsenic preparation. The drug was 
discontinued, but as he was not doing well lit}, arsenicalis fowleri was prescribed. As he wished to go 
to his relations in Italy he left, promising to return but never did so. 
Trypanosomes were only demonstrated in the peripheral circulation on June 4 ; a monkey, rabbit, 
guinea-pig, four rats, and four mice were inoculated with blood on a day when parasites were present and 
developed the infection. 
Periodicity of the Parasite in Natives 1 
Below are given the number of parasites found in fresh coverslip preparations 
of blood from the peripheral circulation. These columns read downwards show the 
periodicity of the parasite. 
Mpangila 
Disasi 
Banja 
3 
1 4 
O 
0 
0 
46 
10 
2 
4 1 
O 
3° 
0 
3 2 
0 
, 
2 0 
O 
5° 
0 
■4 
0 
O 
4 0 
O 
70 
0 
300 
0 
2 
3 3 
O 
0 
0 
4 
0 
I 
6 2 
O 
0 1 
0 
16 
1 
O 
1 5 
6 
2 
2 
4° 
0 
O 
2 2 
0 
0 
2 
40 
c 
I 
0 1 
2 
4 
0 
0 
0 
O 
3 2 
0 
0 
0 
0 
2 
6 7 
0 
0 
0 
8 
0 
O 
8 5 
0 
2 
0 
2 
0 
O 
6 2 
0 
0 
0 
0 
O 
0 
0 
0 
16 
0 
O 
2 
0 
0 
16 
0 
I 
2 
0 
4 
4 
0 
O 
4 
0 
2 
0 
0 
1 
0 
0 
0 
0 
0 
O 
0 
0 
0 
1 2 
0 
O 
2 
0 
0 
0 
I 
2 
0 
2 
0 
90 
O 
0 
0 
0 
0 
2 1 
O 
0 
0 
2 
0 
2 
5 
2 
0 
0 
48 
0 
0 
6 
0 
6 
0 
0 
8 rise of temp. 
0 
0 
0 
5 
0 
34 ioo-6 
0 
0 
0 
1 1 
0 
54 103-4 
0 
4 
0 
0 
12 ioi - 4 
0 
0 
3 
4 
8 
0 
0 
0 
5 
2 
0 
0 
1 
0 
6 
0 
0 
0 
0 
H 
0 
0 
7 
In a later report, periodicity of the parasite in animals as compared with other trypanosomes will be discussed. 
