Philippine Journal of Science 
1920 
Multiple parasitism has been a complicating factor, and the 
need is shown for the study of the specific symptoms, if any, 
produced by the individual parasites. This should be done 
with strict regard to the race involved, for there is a lack of 
uniformity of action produced by parasites in the different 
races. 
No protozoon of proved pathogenicity has been encountered 
in the series. Nearly all the protozoan infections were moder- 
ate. The absence of obligatory tissue parasites from this series 
as well as their rarity in children of the Filipinos is regarded 
as having some significance. It is suggested that an apparent 
immunity of children to forms such as Entamoeba histolytica 
and Balantidium may have a physiological basis in the child. 
The incidence of infections v/ith Spirochseta eurygyrata was 
high (61 per cent) ; and, although no significant phenomena 
are recorded, it is suggested that further investigation of this 
parasite is called for. 
Our experience coincides with that of numerous other workers 
who have failed to record any definite train of symptoms that 
can be attributed to intestinal parasites other than those that 
are specifically pathogenic. Several patients that were not para- 
sitized at the time they came under our observation presented 
symptoms that might easily be attributed to parasites. At the 
same time, concomitant infestation with Trichuris and Ascaris 
is accompanied by a train of symptoms referable to the digestive 
tract that present an almost characteristic picture. In several 
of these cases the clinician gave a diagnosis of ascariasis that 
was later confirmed by the finding of the ova of Ascaris and Tri- 
churis in the fseces. 
No data were secured that would aid in determining a possible 
influence of parasitism on the mental development of any of 
the children studied, and very little information was collected 
that was suggestive as to effects on the nervous system. The 
methods employed with regard to these two factors we do not 
consider adequate, however. 
Study of our cases of ileocolitis, likewise, has failed to yield 
anything satisfactory concerning the influence of parasitism on 
the incidence or course of ileocolitis. 
Infections with Trichuris and Ascaris we regard as offering 
a serious problem in pediatrics. The combination of the two 
helminths is one that is especially serious in as much as the 
entire alimentary tract is involved. 
Children occasionally purge themselves of Ascaris infections, 
