A470 The Philippine Journal of Science 1921 
thous iodide. The cysts of this coccidium appeared only once in 
the stools of the patient, but on that occasion they were exceed- 
ingly numerous. Snijders has given a good description of them ; 
and Dobell,(5) who studied some of his material, has shown that 
the species is entirely distinct from Eimeria oxyspora, to which 
it bears a superficial resemblance in that it forms whetstone- 
shaped spores. There the resemblance ceases. 
This case, of course, must be looked upon as an isolated one. 
The parasite bears no real resemblance, beyond its generic char- 
acters, to any of the other Eimeride that have been reported as 
occurring in man, and there is nothing in the history of the 
man’s travels that would lead us to believe that he contracted 
the infection outside of Sumatra. Snijders observed no intes- 
tinal symptoms that could be attributed to the coccidia. 
One more report requires special reference at this time, 
because it carries the infection farther east and helps to estab- 
lish the banding of the globe by Isospora hominis. That is 
the report of Cragg,(1) who in 1918 recorded four cases of 
Isospora infection in men returned from Mesopotamia. Refer- 
ence to these cases will be made later. 
If we are to regard the five species of coccidia * now credited 
with being parasitic in man as specific parasites of man, and 
evidence to the contrary is lacking, we must expect to find many 
more infections; for every one of the cases reported must, of 
course, have been derived from an infection in some other man. 
It is rather trite to say that these strains must have been 
carried on for long periods of time, and there is little reason 
to believe that they are about to perish abruptly at this time. 
It is barely possible that the dissemination of human coccidial 
infections is partially governed by environmental conditions of 
a peculiar nature, but the distribution already has reached 
points in the Tropics as well as in temperate regions. However, 
very little has been learned as to how much dissemination occurs 
at any points outside of the eastern Mediterranean area. 
Dobell,(6) in his recent report on autochthonous infections with 
intestinal protozoa among inhabitants of Britain, says: 
I would particularly emphasize the fact that no infections with in- 
testinal coccidia or with Balantidiwm appear to have been reported in 
British residents wha have never been abroad. As regards the former, 
it may be noted that there is one British case of supposed coccidiosis of 
the liver (Silcock, 1890) ; but this is still somewhat doubtful. 
*I refer to Eimeria wenyoni, E. oxyspora, E. snijdersi, E. (?) 8P- and 
Isospora hominis. 
