238 PRACTICAL BACTESIOLOGY. 



teria are formed. It does not grow upon potatoes. 

 Apparently it possesses tlie power of spontaneous 

 movement ; and the formation of spores has already 

 been observed in it. It can be stained extremely 

 easily with any of the ordinary aqueous aniline solu- 

 tions, but the preparations succeed especially well if 

 treated according to Gram's method, which may also 

 be employed for staining sections containing these 

 bacteria. 



Apparently the swine erysipelas bacillus is iden- 

 tical with the mouse septicsemia bacillus {Bacillus 

 murisepticus) . The slight differences which are per- 

 ceptible in their cultures in gelatine may probably be 

 accounted for by the different conditions under which 

 they have been placed in their respective hosts. The 

 Bacillus muriseptieus is somewhat the more slender 

 of the two, and in gelatine puncture cultivations the 

 cloudiness spreads out further, nearly reaching to the 

 sides of the glass. When various different animals are 

 inoculated with it, they are affected just as if they had 

 been inoculated with the swine erysipelas bacillus. 



A very virulent epidemic occurs amongst fowls, 

 the chicken cholera, or fowl typhoid. It is caused by 

 sliort, thick, almost ellipsoid bacilli, with rounded off 

 ends ; they occur as a rule either singly or in pairs, 

 but are occasionally united together in chains. Their 

 cultivation is easy, but no characteristic peculiarities 

 are to be observed. Small whitish punctiform colonies 



