286 MICROBIOLOGY 



taneously with 0.25 to 0.75 cc. of a bouillon culture the adja- 

 cent lymphatic glands become caseated. It proved fatal when 

 fed but death occurred much later. Rabbits and mice are sus- 

 ceptible. Pigeons seem to be immune. 



BACTERIUM PYOGENES GRIPS. 



Synonyms. Bacillus pyogenes suis Grips a ; Bacillus pyo- 

 genes bovis Kiinnemann. 2 



Place in nature, A number of investigators have found 

 bacteria in suppurating lesions in different organs in cattle 

 and swine. Lucet 3 was the first to' describe a bacillus in sup- 

 purating lesions in cattle. Grips and Kiinnemann have found 

 them in suppurating lesions in swine and cattle and Poels 

 found apparently the same organisms in arthritis. Glage 4 

 pointed out the probable identity of these organisms. Its ex- 

 istence outside of the animal body is not known. The some- 

 what extensive literature on this organism has been summar- 

 ized by Berger. 5 



Morphology. The bacteria appear as rods from 0.2 to 

 3.0 /z in length with a breadth somewhat constant of from 0.2 

 to 0.3 fji. Spores do not form. Many of the individuals appear 

 as micrococci, due to the shorter forms after division. The 

 ends are often somewhat pointed. 



Staining. It stains readily with carbol fuchsin and 

 aniline gentian violet and less strongly with methylene blue. 

 It does not always stain strongly with Gram 's method although 

 it is considered Gram positive, and this stain is considered of 

 great value in differentiating this organism in exudates. Sev- 

 eral of those who have worked with it have found that it 

 stained very slightly by Gram's method. 



1 Grips. Inaug. Diss. Giessen, 1902. Also Zeit. f. Fleisch und 

 Milch-hygiene, 1898. 



2 Kiinnemann. Archiv. f. Wissensch. u. Tierheilkunde, Bd. 

 XXIX (1903) p. 128. 



3 Lucet. Ann. de 1'Inst. Pasteur, Vol. VII (1893) p. 325. 



4 Glage. Deut. tierartzliche Woch., No. 47, 1903. 



5 Berger. Zeit. f. Infektionskrankheiten . . . der Haustiere, Bd. 

 Ill (1908) p. 101. 



