6o 
THOMPSON YATES LABORATORIES REPORT 
The following tables illustrating the periodicity of F. nocturna have been 
constructed from our own notes of a number of cases among West African natives. 
Three specimens were made from each case every three hours. Sufficient blood was 
taken, to form as nearly as possible a complete film under a cover glass three-quarter 
inch square, and the specimens were examined in the fresh condition. Throughout 
the following tables the maximum number of filariae in three slides is indicated by a 
larger type of figure. 
TABLE V 
Name 
Date 
Number of 
Filariae 
IN THREE SLIDES AT 
A.M. 
P.M. 
3 
6 
9 
I 2 
3 
6 
9 
1 2 
I. 
Oparobo 
I I . 
vii. 00 
20 
0 
0 
O 
0 
10 
48 
26 
2. 
Deafman 
I 2. 
vii. 00 
0 
2 
0 
O 
0 
0 
1 
3 
3- 
James 
1 2. 
vii. 00 
7 
0 
i 
O 
0 
0 
II 
9 
4- 
Abraham 
27. 
viii. 00 
0 
1 
0 
I 
0 
0 
4 
2 
5- 
Onye mensoh 
27. 
viii. 00 
18 
2 
0 
O 
0 
25 
45 
56 
6. 
Sumanu 
27. 
viii. 00 
7 
0 
0 
O 
0 
17 
21 
9 
7- 
Osadebe 
27. 
viii. 00 
28 
2 
1 
O 
0 
35 
3 + 
50 
8. 
Eyamah 
27. 
viii. 00 
2 
0 
0 
O 
0 
3 
7 
19 
As to the periodicity of F. diurna, Manson 1 says simply that the parasites 
come into the blood during the day and disappear from it during the night ; and, the 
periodicity observed by the parasite was thoroughly made out by prolonged 
observation in one of the cases. Actual records we have not been able to find. 
From our own collection of records of cases we have constructed the following 
table illustrating the periodicity of F. diurna : the figures represent the number of 
embryos in three specimens of blood under a three-quarter inch square cover glass. 
1. Manson, Tropical Diseases, London, 1900. P. 532. 
