168 



TETANUS, MALIGNANT (EDEMA, ETC. 



SYMPTOMATIC ANTHRAX. 

 Bacillus Anthracis Symptomatici. 



History. Ferrer and Bellinger discovered a bacillus in the 

 disease of animals known as black leg, quarter evil, or quarter 

 ill, which is also found in humid soils in certain localities 

 during the summer months, especially when those places have 

 been contaminated with discharges from infected animals. 



Morphology. The description of this microorganism given 

 by Kitasato is as follows : 



Actively motile rods, 3 to 5 mikrons in length, and from 

 0.5 to 0.6 mikron in thickness, occurring singly, occasionally 

 in pairs, never forming filaments (Fig. 62). 



FIG. 62. 



Bacillus of symptomatic anthrax: A, vegetative stage gelatin culture; 

 B, spore-forms agar-agar culture. (Abbott.) 



It stains by all the anilin colors. It forms spores, which are 

 situated at or near one of the poles, giving a swollen appear- 

 ance to the bacillus. 



Biologic Characters. In the vegetative type it is actively 

 motile, but loses its motion in the spore-bearing form. It 



