27 
From these figures it is apparent that the swamps in the suburbs 
of Manaos are responsible for a considerable number of cases of 
malaria. Of a total number of 470 healthy and ailing children, the 
spleen was palpable in 206, or 43-82 per cent. Blood examination 
of 335 of the children showed malaria parasites to be present in 173, 
or 5164 per cent. If we compare spleen and blood examinations 
made on children of the same ages, resident in Manaos and living 
near swampy and low-lying land such as Iga.ra.pes Bittencourt and 
Manaos, S. Vicente etc., the number of infected children is much 
the greater in the suburbs. 
LIVING ALONG THE SWAMPS IN THE CITY 
Age 
Child ren 
Spleen palpable 
Blood 
examined 
I 
11 
in 
Total 
Percentage 
Children Parasites 
examined present 
Percentage 
6 months to 2 years 
2 to 5 years 
5 to 8 years 
8 to 10 years 
21 
64 
33 
59 
I 
I 
3 
1 
3 
7 
6 
1 
5 
4 
12 
2 
9 
14 
19 
9-5 
14-06 
42-4 
32-20 
18 5 
47 H 
33 18 
49 22 
27-77 
29-78 
54-55 
44-89 
Total spleens examined . 
Total palpable ... . 
Percentage palpable ... . 
177 
44 
24-85 
Total bloods examined 147 
Total parasites present 59 
Percentage infected ... 40-13 
COMPARISON OF MALARIA INDEX OF CHILDREN IN SUBURBS AND CITY 
Spleen rate 
Blood rate 
0-5 years 
5-10 years 
0-5 years 
5-10 years 
Swamps / Apparently healthy 
in - Ailing . 
Suburbs 1 Average both classes 
City sw'amps 
36-23 
46-82 
43'°7 
I2 '94 
4 2 ’74 
45- 8 3 
44 T 6 
35-86 
4 8 -93 
51-80 
50-61 
29-23 
50-00 
57**4 
52-60 
48-78 
Thus we find that the spleen rate for the suburbs is 43 82 per cent, 
as compared with 24-85 per cent, for the city, and the malarial blood 
index in the suburbs is 51-64 per cent., in the city 40-13 per cent. 
