PART I. INCIDENCE 



19 



dysentery and 1,137 who gave no such history. Amongst the 

 former there were found to be 16 carriers of E. histolytica, giving a 

 percentage of 6'5, while amongst the latter there were 52 carriers 

 giving a percentage of 4'5. Of the men who had served in Egypt 

 alone only 20 gave a history of previous dysentery and amongst 

 them no carriers were found, but of 568 who gave no history of 

 dysentery 26 were carriers yielding a percentage of 4*5, a result 

 which is identical with that obtained from the similar group of 

 men who had served both on the Peninsula and in Egypt. This 

 fact would seem to indicate that the incidence of infection was not 

 greater on the Peninsula than in Egypt. The men, however, who 

 gave a history of dysentery yielded a higher percentage of carriers 

 than those who had no such history. 



The highest percentage for E. histolytica was found amongst 

 cooks employed at Mustapha Convalescent Depot and at Sidi Bishr 

 camp. The cooks of Sidi Bishr camp showed a higher percentage 

 of protozoal infections than any other group of healthy men 

 examined. 



The total number of healthy men examined was 1,979 and the 

 complete findings are shown in the last column of Table III. 

 These may be taken as representative figures for the healthy troops 

 in Alexandria, as the men were taken in groups from very different 

 areas. It must not be forgotten that the figures are based on the 

 result of a single examination. 



TABLE III. THE VARIOUS PROTOZOAL INFECTIONS FOUND AMONGST A SERIES OP 

 1,979 HEALTHY TROOPS EXAMINED IN ALEXANDRIA IN THE EARLY PART OF 1916. 



The other protozoal findings in these various groups are set 

 forth in Table III (above). It will be seen that the infections 



