PROTOZOOLOGIC AND CLINICAL STUDIES ON THE 
TREATMENT OF PROTOZOAL DYSENTERY WITH 
BENZYL BENZOATE 
Il. TREATMENT OF A CASE OF ACUTE BALANTIDIOSIS; RECOVERY ; 
DEATH FROM OTHER CAUSES; FAILURE TO FIND THE PARASITES 
IN THE BOWEL LUMEN AND GUT WALL AT AUTOPSY * 
By FRANK G. HAUGHWOUT 
Protozodlogist, Bureau of Science 
and 
ELiAs DOMINGO 
Specialist in Nervous and Mental Diseases, Philippine Health Service 
WITH A PRELIMINARY NOTE ON THE ANATOMICAL FINDINGS 
AT AUTOPSY 
By WaALFRIDO DE LEON 
Instructor in Pathology, University of the Philippines 
In the first paper of this series the senior author, in collabo- 
ration with Doctors Lantin and Asuzano,(1) reported on the 
treatment of eight cases of acute entameebiasis with benzyl 
benzoate. The results obtained in that series were so en- 
couraging that it was determined to extend the experiments to 
affections produced by other intestinal protozoa. Subsequent 
experiments on cases of entameebiasis have confirmed our earlier 
observations, but the treatment of flagellate infections has been, 
as was our expectation, much less encouraging. The case about 
to be reported is the first infection with Balantidium coli that 
has fallen under our control since the experiments were started ; 
and, although we report a single case with some hesitation, still, 
the circumstances under which the case was studied were, in 
some respects, so favorable, and the results we obtained 
so good, that we feel justified in making the report in order 
that other investigators may take up the work as opportunity 
comes to them. Moreover, it must be recalled that the clinical 
treatment of balantidiosis has always been more or less 
unsatisfactory. 
*Contribution from the laboratory of protozodlogy and parasitology, 
Bureau of Science. 
633 
