248 Intestinal Protozoa of Man 
around the periphery and the karyosome itself were broken up into minute 
dots, which were distributed irregularly around the nuclear edge and through¬ 
out the interior. In one amoeba containing five Lamblia cysts the host was 
non-motile and granular and the presence of a degenerated nucleus and the 
shrunken protoplasm gave the clue to the diagnosis of Entamoeba coli. In 
this case the amoeba seemed to have died of repletion owing to the size and 
number of the inclusions. In no case did the ingested protozoal cysts seem 
to be affected by their confinement. In one Lamblia case the eosin, which on 
application stained a dead amoeba, did not penetrate or stain a Lamblia 
cyst included in the amoeba. 
Although chromatoid bodies have been known to occur in Entamoeba coli 
cysts, nevertheless these bodies have generally been considered to be of un¬ 
common occurrence in the lion-pathogenic amoeba. I made careful examina¬ 
tions in 293 cases of E. coli infection to see in how many cases I could find 
“chromidial bodies.' 1 I found the body present in some of the cysts in 15 out 
of 110 white cases and in 17 out of 183 healthy Egyptian cases, or in 32 out 
of 293 altogether. The bodies were generally more slender than those found 
in E. histolytica, cysts and often appeared as pointed spindles; the big “chromi- 
dial blocks 11 so common in the latter infection were not found, except in some 
of the binucleate E. coli cysts: even when present in Entamoeba coli cysts, 
chromatoid bodies were very rarely seen in such great numbers of cysts as in 
E. histolytica infections: two cases in which these bodies were present in 
E. coli cysts in large numbers were found in Alexandria (Wenyon and 
O’Connor). I found only one similar case during the Sinai examinations. 
• Trichomonas hominis. 
Tetratrichomonas was the form in which this parasite was most frequently 
seen, although Trichomonas (sensu stricto) was not uncommonly found. 
In three cases of Trichomonas infection complicated by the passage of 
blood and mucus in the faeces, red blood cells were observed within the 
flagellate. Two of these cases were Indian soldiers and the other was a native 
Egyptian. In each case many of the Trichomonads included a corpuscle, but 
only one red cell was observed in any particular parasite. As these findings’ 
lent support to the view sometimes advanced that Trichomonas is pathogenic, 
I arranged to have my cases carefully controlled bacteriologically by Captain 
G. Stuart, R.A.M.C., T.F. This officer isolated Flexner Y from one case, and 
in another a non-lactose fermenting organism was found, which, however, 
failed to agglutinate with any of the known sera. The third case from which 
no organism was isolated, occurred in a native Egyptian who was passing 
large masses of Schistosoma mansoni in a medium of red blood, pus and 
epithelial cells. Schistosoma was obviously the cause of the man's condition. 
A number of other cases associated with the presence of Trichomonas , but in 
which blood and mucus were not passed, were also controlled bacteriologically, 
and in many of these a definite pathogenic bacillus was isolated. Species of 
