16,1 Haughwout and Horrilleno: Intestinal Parasites 7 
immediate surroundings and the water drunk have less bearing 
on the incidence of parasitism than is generally believed. We 
have recorded children living under the best hygienic conditions 
as regards cleanliness of surroundings but who, notwithstanding, 
were more or less heavily parasitized ; and, in contrast, we have 
found instances where the children lived in surroundings that 
were filthy and overcrowded, but who survived the ordeal and 
failed to exhibit the slightest evidence that they were parasitized 
with either helminths or protozoa. It is perhaps easier to ex- 
plain the first than the second condition. 
The geographical distribution of our cases is set forth in 
Tables 3 and 4. 
Table 3. — Incidence of parasitism in Manila. 
District. 
Cases. 
Para- 
sitized. 
Not para- 
sitized. 
Binondo _ _ 
2 
1 
1 
5 
6 
1 
1 
MnlfttA 
7 
7 
Paco 
10 
10 
Paodaran . _ 
1 
Quiapo _ _ 
1 
1 
Sampaloc . 
8 
1 
San Lazaro 
2 
1 
San Miguel 
1 
1 
Santa Ana . , 
4 
4 
Santa fJiara 
1 
1 
Santa Cruz _ 
12 
9 
3 
Santa Mesa .. _ 
3 
Singalong 
6 
6 
Tondo 
5 
6 
Trozo 
2 
2 
Undetermined 
5 
5 
Total 
77 
71 
6 
Table 4. — Incidence of parasitism in the provinces. 
Province. 
Cases. 
Parasi- 
tized. 
Not para- 
sitized. 1 
Bataan 
1 
1 
Batangaa . . _ 
1 
1 
Bulacan , _ . - 
1 
1 
Cavite 
5 
6 
Mindoro 
1 
1 
Nueva Ecija 
1 
Pampanga 
2 
2 
Paneaflinan . 
2 
2 
Rizal 
Total 
23 
22 
