PATHOGENIC ANAEROBIC BACILLI. 



585 



a white color by reflected light. The culture medium acquires an acid re- 

 action as a result of the development of the bacillus. 



Liver tissue containing this bacillus, after having been kept in an anti- 

 septic wrapping for forty-eight hours, has a fresh appearance, a very acid re- 

 action, and is without any putrefactive odor. 



Pathogenesis. Liver tissue containing this bacillus is rery pathogenic 

 for guinea-pigs when injected subcutaneously, and causes an extensive in- 

 flammatory cedema extending from the point of inoculation. Pure cul- 

 tures of the bacillus are less pathogenic, and the few experiments which I 

 made in Havana gave a somewhat contradictory result, recovery having 

 occurred in one guinea-pig which received a subcutaneous injection of ten 

 minims of liquid from an anaerobic culture in glycerin-agar, while another 

 died at the end. of twenty hours from a subcutaneous injection of three 

 minims, with extensive inflammatory cedema in the vicinity of the point of 

 inoculation. 



BACILLUS OF SYMPTOMATIC ANTHRAX. 



Synonyms. Rauschbrandbacillus, Ger. ; Bacille du charbon 

 symptomatique, Fr. 



First described by Bellinger and Feser (1878); carefully studied 

 and its principal characters determined by Arloing, Cornevin, and 

 Thomas (1880-83). 



FIG. 167. 



FIG. 168. 



FIG. 167. Bacillus of symptomatic anthrax, from an agar culture, x 1,000. From a photomi- 

 crograph- (Frankel and Pfeiffer.) 



FIG. 168. Bacillus of symptomatic anthrax, from muscles of inoculated guinea-pig. From a 

 photomicrograph. (Roux.) 



Found in the affected tissues of animals principally cattle suf- 

 fering from " black leg," " quarter evil," or symptomatic anthrax (Fr. ? 

 " charbon symptomatique"; Ger., " Rauschbrand "). The disease 



