16,1 Heughwout and Horrilleno: Intestinal Parasites 31 
From the foregoing data it will be seen that breast and arti- 
ficial feeding do not necessarily confer freedom from parasitism. 
It appears to us that they somewhat reduce the chances of in- 
fection. Two children (Nos. 35 and 76) aged 16 and 13 
months, respectively, had been breast-fed since birth and, so 
far as the laboratory findings and history showed, had escaped 
infection with protozoa or helminths although both were in- 
fected with spirochetes. One gains the impression that trouble 
starts with the beginning of artificial or bottle feeding. We 
shall discuss the factors involved later on. 
The group shown in Table 10 comprised nineteen cases, of 
which eleven were boys and eight were girls. Ten of the boys 
and four of the girls were found to be infested with one or 
more parasites. 
The foregoing tables are more or less informative from a 
certain viewpoint, and the reader gains the general impression 
that infestation with intestinal parasites is accompanied, in a 
large proportion of cases, by certain phenomena. General 
impressions of this nature, however, are not particularly satis- 
factory as a basis for diagnosis or treatment. The reader can- 
not fail to notice the rather striking similarity in the picture 
presented by individual and collective infestations with the hel- 
minths, but he will seek in vain for any manifestation that 
will point unerringly to infection with any particular species. 
This is trite but none the less true. Variations in the severity of 
symptoms in practically similar combinations of parasites can, 
in many instances, be accounted for by differences in the in- 
tensity of infection; but this does not furnish an explanation 
in every case. 
For the most part, effects upon the mental development and 
the nervous system seem not to be especially marked, but al- 
lowance must be made for the methods of estimating these 
that circumstances forced us to adopt. It is not unlikely that 
more exact methods would yield different results. The abdom- 
inal symptoms are, however, more suggestive and, in many 
instances, are rather striking. In as much as these findings 
are capable of interpretation from several different viewpoints, 
our inclination is to let the reader study the records and make 
his own interpretations, bearing in mind that only Filipino chil- 
dren are involved. Nevertheless, several points of general in- 
terest occur to us that it seems worth while to discuss. 
