16,6 Haughwout et al.: Protozoal Dysentery 641 
cure results similar to those we seem to have attained by the 
use of benzyl benzoate in this case, the outlook for the patient 
will appear more favorable. 
Mason (4) has recently reported on the treatment of a case 
of balantidiosis, occurring in a Danish missionary in Yunnan 
Province, China, with oil of chenopodium and olive oil injected 
directly into the lower bowel. The acute symptoms cleared up 
very promptly. The patient had a slight relapse six days after 
the second treatment and was treated again. The case was 
under observation for three weeks, at the end of which time 
the stools v/ere negative for the parasites and the patient seemed 
perfectly well. Mason takes a conservative view of his case 
and admits the possibility of a relapse, but reports his findings 
as we do ours, for what they may be worth to other investiga- 
tors. We gather from his account of the case, however, that 
it was not nearly so severe as ours, for his patient seems to 
have been ambulant. Three weeks’ observation is too small a 
limit to place in determining a cure, as Mason seems fully to 
realize. 
SUMMARY AND DISCUSSION 
By Frank G. Haughwout 
A case of acute balantidiosis, complicated by infections with 
hookworm and Trichuris, was treated with benzyl benzoate. 
At the time treatment was started, twenty-three days after 
the onset of the disease, the patient was exhausted and ap- 
parently near to death. 
The abdominal pain and tenesmus, associated with the dys- 
enteric process, disappeared within twenty-four hours after 
treatment was started and did not return again, even after 
treatment was stopped twenty-four days later. 
The parasites showed a tendency to diminish in numbers in 
the fseces until the eighth day following the institution of treat- 
ment, when they suddenly appeared in the stool in immense 
numbers. On this day the stool was feculent, but contained 
mucus. No demonstrable tissue elements were found. I am 
inclined to regard this as the expression of a wholesale exodus 
of the dilates from the tissues. 
I believe that, had the patient not been under treatment, 
this “swarming” of the parasites would have been accompanied 
by pain, tenesmus, and the other symptoms constituting the 
dysenteric complex. 
That the patient did not exhibit the symptoms that ordinarily 
