150 BACTERIOLOGY. 



was probably included at first in the collective 

 species " B. termo" It forms spherical cells 

 and rodlets which unite in long filaments, and 

 belongs, therefore, among the arthrobacteria. 

 Its vegetative rod-forms have numerous diffuse 

 flagella ; it liquefies gelatin, producing at the 

 same time a carrion-like odor ; it does not stain 

 by Gram's method. If the organism is in- 

 jected into the vein of a dog, the animal sickens 

 with vomit and diarrhoea both accompanied by 

 haemorrhage and with yellow discoloration of 

 the sclera. The same hsemorrhagic enteritis 

 occurs when filtered cultures are injected, hence 

 the inference that we have here a case of simple 

 intoxication. In man, Proteus is sometimes 

 found in purulent and malodorous phlegmon- 

 ous inflammations, in the so-called putrid in- 

 toxications, in acute jaundice (Weyl's disease) 

 where it occurs in the urine, and in some cases 

 of rag-pickers' disease. 



B. pyocyaneus* discovered by Gessard, is 

 known both in the rod form and in the fila- 

 mentous form and is also to be regarded as an 

 arthrpbacterium. It is characterized by the 

 blue-green, sometimes leek-green color, that is 

 developed in cultures (cf. pyocyanin p. 122). 

 In rabbits it usually produces only a general 



1 Cf. Barker, Journ. of the Amer. Med. Assoc., XXIX., No. 5, p. 

 213. 



