36 



bowels moved 2-3 times a day. In hospital for tuberculosis oi 

 knee. Father a soldier, in France. Cysts few, ca. 12 fi in 

 diameter. (Also infected with M coli and Giardia.) 



Case 5.— Boy of 9, living in Sheffield. Has never suffered 

 from dysentery or diarrhoea — and appears perfectly healthy. In 

 hospital for amputation of leg. Cysts few, belonging to two 

 different races — ca. 7 /x and 12 /i in diameter. (Also infected 

 with E. coli.) 



Summary and Conclusions. 



At Leeds and Sheffield I examined altogether 506 members 

 of the civil population who had never been abroad. These 

 consisted of 321 adults and 185 children. Out of this number 

 10 individuals were found to be infected with Entamoeba histo- 

 lytica — that is, approximately 2 per cent. A higher rate of 

 infection was found in children than in adults, the figures being : 



5 out of 185, or 2.7 per cent, of children infected with B. histolytica. 

 5 „ „ 321, „ 1.5 „ „ adults „ „ „ ,, 



The other intestinal protozoa were also found more frequently 

 in children than in adults. At Leeds 32-7 per cent, of adults and 

 50-8 per cent, of children were found infected with protozoa other 

 than E. histolytica. The most striking difference was in the rate 

 of infection with lamblia {Giardia intestinalis), the figures being : 



The percentages given are all ■ probably too low, since in the 

 majority of cases they are calculated on the result of one 

 examination only. 



Appendix. 



Non-dysenteric military patients. 



In order that a comparison might be made with the foregoing 

 results obtained from civilians, a certain number of non-dysenteric 

 military patients were examined during July 1918. The majority 

 were nephritis cases at Killingbeck Military Hospital, Leeds, the 

 remainder being surgical cases at East Leeds War Hospital, and 

 about five were from the Leeds General Infirmary. The results 

 are tabulated below : 



Total No. of cases examined ..... 71 



Protozoa : Percent, infected. 



JSniamoeba histolytica . ..... 7.0 



Entamoeba coli . . ... 40-8 



Endolimax nana . . . . . ll-S 



lodamoeba bUtschlii ....... 4-2 



Giardia intestincdis . . . . . . 8.5 



Chilomastix mesnili . ..... 4-2 



