is, 4 Haughwout: Human Coccidiosis 451 
had an attack of dysentery in Manila in 1916 and has expe- 
rienced some bowel trouble since her return to the United States. 
I was led to believe that her dysentery was of the amoebic type. 
Late in January of this year, the patient went to Mindanao, 
and into the Cotabato country. He went on a hard field trip 
about February 5, 1921, for which he was not physically pre- 
pared. He had three days of hard marching in the hot sun 
and, as a result, returned to headquarters completely exhausted. 
He did not take proper care of himself and sustained a chill. 
A period of constipation set in, and he sought relief with com- 
pound cathartic pills. These acted promptly, and he began 
to pass frequent watery stools which, however, were not accom- 
panied by tenesmus. He saw neither blood, pus, nor mucus in 
the stools. This diarrhoea continued intermittently for several 
days. 
Feeling rather sick, the patient returned to Manila. The 
trip consumed eleven days on the boat, during which time he 
had little if any appetite and ate very lightly. He had, however, 
accumulated something of an appetite on his arrival in Manila 
on February 26, and that night he visited a restaurant and ate 
a heavy meal consisting of beefsteak, potatoes, celery, and a 
variety of other things. He repeated this the following night. 
The diarrhoea recurred on the morning of February 28, and 
continued all the following day. The movements were very fre- 
quent and watery in character. On the afternoon of March 1, 
he came to the Bureau of Science where his stool was examined 
by a member of the staff. The microscopist subsequently stated 
to me that the stool contained numerous small amoebae, but no 
blood. These amoebae were not identified. The patient then 
began to treat himself with Alcresta ipecac tablets. 
On March 3 I returned from an out-of-town trip and the case 
was referred to me. I saw the patient the following day, at 
which time he informed me that the watery movements 
had increased in number and were inconveniently frequent. He 
said that he had suffered no real abdominal pain or tenesmus, 
but that there was considerable abdominal discomfort of a 
rather vague character due, he thought, to gas. His abdomen 
was not tender to palpation. His stool was dark in color and 
diarrhoeal in character, but bore absolutely no evidence of dys- 
entery. No amoebae were found at this or any subsequent exam- 
ination, and there was no evidence of blood or tissue elements 
of any kind. One undeveloped oocyst of Isospora hominis was 
