Volume XI 
OCTOBER, 1919 
Nos. 3 AND 4 
INTESTINAL PROTOZOA FOUND DURING ACUTE IN¬ 
TESTINAL CONDITIONS AMONGST MEMBERS OF THE 
EGYPTIAN EXPEDITIONARY FORCE, 1916—1917. 
By F. W. O’CONNOR, M.R.C.S., D.T.M. and H. (Cams.), 
(Temp.) Captain, R.A.M.C. 
London School of Tropical Medicine. 
(With Plate XI and 3 Text-figures.) 
LA REPORT TO THE MEDICAL RESEARCH COMMITTEE.] 
In the summer of 1916, during the advance across Sinai, the prevalence of 
amoebic dysentery amongst our troops occasioned the appointment of a 
Protozoologist to the Field Laboratories. While 1 was engaged in this capacity 
the work recorded in this paper was carried out. 
Investigations were made in several laboratories and I am indebted to 
the several bacteriologists who co-operated in this work; especially to Major 
A. R. Ferguson, R.A.M.C., who organized and controlled the laboratories, 
and Captains C. M. Craig, R.A.M.C., and G. Stuart, R.A.M.C., T.F., with whom 
I worked for many months. Captain Linklater, R.A.M.C., T.F., and the 
late Captain Ian MacFarlane, R.A.M.C., rendered me valuable assistance in 
collecting clinical data of many cases. Lieut.-Col. P. Lelean, C.B., R.A.M.C., 
helped me materially by organizing the collection of specimens from all units, 
many of which were many miles distant from the laboratory. 1 am very much 
indebted to Col. A. Alcock, F.R.S., and Prof. Clifford Dobell, F.R.S., for the 
help they have given me in preparing this paper for publication. 
According to instructions all stools from diarrhoea! cases were examined 
twice for the cholera vibrio by the bacteriologists, and by myself as often as 
was necessary—sometimes six times—for Entamoeba histolytica and other 
Protozoa. Where possible, as in units in the immediate vicinity, the whole 
stool was inspected. From units at a distance specimens were sent in specially- 
made glass or tin tubes, tightly corked. 
The cases included white troops, Indian native troops, and members of the 
Egyptian Labour Corps. During periods of advance when the laboratory was 
left behind for a short time and the amount of routine work in consequence 
Parasitology xr 
10 
