BACILLUS ANTHRACIS AND ANTHRAX 



785 



serum over normal serum has not been satisfactorily demonstrated. 

 Bacteria Closely Resembling Bacillus Anthracis. In most labora- 

 tory collections there are strains of true anthrax bacilli so attenuated 

 that they are practically non-pathogenic. These do not differ from 

 the virulent strains in any morphological or cultural characteristics. 

 Besides such strains there are numerous non-virulent bacteria cul- 



FIG. 82. BACILLUS SUBTILIS. (Hay Bacillus.) 



turally not identical with Bacillus anthracis, but resembling it very 

 closely. 



B. ANTHRACOIDES (Hueppe and Wood 23 ). A Gram-positive bacil- 

 lus, morphologically different from B. anthracis in that the ends 

 arc more rounded. Culturally, somewhat more rapid in growth and 

 more rapid in gelatin fluidification. Non-pathogenic. Otherwise 

 indistinguishable from B. anthracis. 



B. RADICOSUS (Wurzel Bacillus). Cultivated from water city 

 water supplies. Morphologically somewhat larger than Bacillus an- 



23 Hueppe und Wood, Berl. klin. Woch., xvi, 1889. 



