38 BOWMAN. 



unaffected in either case. Examination at the end of eighteen hours 

 revealed absolutely no change in the homogeneity of the suspensions of 

 the latter organism. 



Summary. — During the past summer, especially during the months 

 of July and August, several severe cases of infantile dysentery developed 

 in Manila. A bacillus was isolated which culturally and morphologically 

 resembled in some ways B. dysenteries, in others B. coli and B. typhosus. 

 The specific agglutinins developed in animals through inoculation of this 

 bacillus did not react with B. dysenteries, B. coli and B. typhosus, but 

 organisms isolated from three other cases of dysentery were agglutinated 

 in high dilutions, each by the specific serum of the other. 



Serum from one patient agglutinated the bacillus isolated from the 

 same patient, yet did not agglutinate other organisms from the same 

 source. 



Conclusions. — Intestinal organisms, especially the Shiga bacillus, ex- 

 hibit such varied cultural and agglutinative characters when growing 

 under different conditions and in different localities, that it is very 

 difficult to classify them. Prom the above observations and a search 

 through the literature we are led to believe that the bacillus isolated from 

 these eases has hitherto not been described as one of the exciting factors 

 in dysentery, but the specific character of the serum of one these cases 

 and of that from rabbits immunized against Bacillus "S" seems to show 

 conclusively that this bacillus was the cause of the epidemic of infantile 

 dysentery which has been described. 



