PART I. INCIDENCE 



21 



amongst the former was 12*0, while amongst the latter it was 7'8. 

 There were 111 convalescents who had not been on the Peninsula, 

 and they had all served in Egypt alone except 11 who had been 

 at Salonica. Only 8 gave a previous history of dysentery, and no 

 carriers were found amongst them, while the remaining 103 who 

 had no history of dysentery yielded 4 carriers. These results are 

 shown in Table IV. 



TABLE V. THE RESULT OF THE EXAMINATION OF THE 961 HOSPITAL CASES 



ARRANGED ACCORDING TO THE CHARACTER OF THE STOOL (IN PERCENTAGES). 



(c) Hospital Cases. Those included under this heading are 

 cases which were admitted to the Orwa-el-Waska section of the 

 19th General Hospital for dysentery, diarrho3a, and other intestinal 

 disorders. In practically all these cases the entire stool was 

 examined, and the character of the stool noted. The great 

 majority of those described as blood and mucus were from cases 

 of bacillary dysentery, while only a few (6'1 per cent.) were from 

 cases of amoebic dysentery. In Table V given above the findings 

 in the 961 cases tabulated are arranged according as to whether the 

 stool was formed, unformed, liquid, or blood and mucus. In the 

 latter case it does not necessarily mean that the stool consisted of 

 nothing but blood and mucus, but that blood and mucus were present. 

 In the majority, however, as these were cases of bacillary dysentery, 

 blood and mucus were alone present, or formed the bulk of the stool 

 in the manner characteristic of this disease. The percentages in 

 the four columns show clearly that protozoa were most common in 

 the unformed or liquid stools. It is, perhaps surprising that the 

 encysted forms of E. coli and E. histolytica were more often 

 found in stools of this kind than in the formed stool. As was to be 

 expected, free forms of E. histolytica with included red blood 

 corpuscles were only found in the case of the blood and mucus 



