SCHIZOMYCETES 



Genus Alcaligenes Castellani and Chalmers, 1918. 



Definition. — -Ebertheae which do not ferment glucose or lactose, 

 and are characterized by their general lack of fermentative power 

 and by actuall}?^ increasing the alkalinity of the media. Milk is 

 not clotted, and is rendered alkaline. 



Type. — ■Alcaligenes fcecalis (Petruschky, 1896), emendavit Castel- 

 lani and Chalmers, 1918. 



Here also comes Alcaligenes vivax (Archibald, 1918), which was 

 obtained from the blood of a case of enteroideain the Anglo-Egyptian 

 Sudan, produced acidity in galactose and mannitol and was charac- 

 terized by its marked motility. 



Classification. — -These various organisms can be differentiated 

 as follows : — - 



A. Non-motile — Metalkaligenes. 



B. Motile:— 



I. No acidity in any sugar — Fcecalis. 

 II. Acidity in mannitol — Vivax. 



Genus Eberthus Castellani and Chalmers, 1918. 



Definition.— Bacillacese motile, partially fermenting glucose with 

 the production of acid and no gas. Lactose not fermented. Milk 

 not clotted. 



Type Species. — Eberthus typhosus (Zopf, 1885). 



Remarks. — ^This genus has as its type species the organism which 

 causes that variety of enteric fever which is called typhoid fever, 

 as well as a number of species which are the causal agents of forms 

 of enteroidca. 



Classification. — -The genus contains the following species, in 

 addition to the type: — -E. kandiensis Castellani, E. ialavensis 

 Castellani, E. priztnitzi Castellani. 



They may be differentiated biochemically as follows, though they 

 can be distinguished, in addition, by their serological reactions : — 



Mannitol. 



Acid. No change. 



i - ' I 



Maltose. Saccharo=ie. 



Acid. No change. Acid. No change. 



Typhosus. Kandiensis. Talavensis. Priztnitzi. 



Genus Shigella Castellani and Chalmers, 1918. 



Definition.— Ebertheae non-motile, partially fermenting glucose 

 with the production of acid, but no gas; lactose not fermented. 

 Milk not clotted. 



Ty^es,— Shigella dysenterice (Kruse, 1899). 



Remarks.— This genus includes a number of forms which are 

 associated with bacillary dysentery, but in going through those 

 which have been described, we have rejected all with very imperfect 

 descriptions which will never permit of their recognition. 



