112 SUMMARY OF CUlcRENT RESEARCHES RELATING TO 



the allied troops operating in the Argonne from December, 1914, to 

 March, 1915. No case of amoebic or flagellate protozoan dysentery was 

 observed, all the infections noted being bacillary in origin. With 

 regard to fermentation reactions, the majority of the organisms isolated 

 closely resembled the " Bacillus Y " described by Hiss, as can be readily 

 observed from the following table : — 



Saccharose Maltose Mannite 



Shiga — — — 



Flexner + + + 



Strong — + + 



Hiss - - + 



" Bacillus of the Argonne " .. - — + 



The reaction of the two organisms thus agree in the production of 

 acid without gas in mannite, while producing no change in saccharose 

 or maltose. 



No agglutination was produced with ^^f anti-typhoid, anti-paratyphod 

 A and B, and anti-Shiga sera with a titre of ^:^Vt75 but agglutination was 

 produced with an " anti-Y " serum in dilutions between -^-^ and jTr&irt 

 and with anti-Flexner serum (titre W^o) between ^^^^ and :f^\j^ dilu- 

 tions. Agglutinations were also observed with the homologous sera 

 derived from the patients themselves. In all, twenty-five strains of this 

 bacillus were isolated. Two strains of an organism giving the sugar 

 reactions of B. dyaenteriae (Shiga) were also isolated, but they failed to 

 give any agglutination with a powerful anti-Shiga serum, or with the 

 homologous sera of the patients themselves ; they gave, however, a 

 positive complement fixation reaction with the latter sera. 



