DESCRIPTION OF SPECIES. 



509 



Colonies circular, bluish-green, 

 "with a granular nucleus and delicate 

 irregular periphery. 



In the depth of gelatine there is 

 scarcely any growth in the track of 

 ihe needle, but a shining greenish- 

 yellow film on the surface, and 

 liquefaction below it. 



On agar the growth is faintly 

 yellow. 



In broth they produce turbidity 

 and a yellowish deposit. 



On potato the growth is yellow- 

 ish. 



They occur in earth. 

 BaciUus diphtheriae (p. 332). 

 Bacillus diphtlieriae coliun- 

 ■bamm (p. 336). 



Bacillns dysodes(Zopf). — Cocci, 

 long and short rods, and spores- 



They were observed in bread, 

 making it greasy and unfit for food, 

 and generating a penetrating odour 

 resembling a mixture of pepper- 

 mint and turpentine. A great loss 

 may result to bakers if the fungus 

 is introduced with the yeast. 



Bacilliis endocardltidis cap- 

 snlatns (Weichselbaum). — Cocci 

 resembling Friedlander's pneumo- 

 cocci. 



Colonies faintly yellow, with 

 ■dentated contours. 



In the depth of gelatine the 

 growth produces a filament in the 

 track of the needle, and a patch 4ike 

 stearin on the free surface. 



Large doses injected subcutane- 

 ■ously, or into the peritoneal cavity 

 prove fatal to rabbits. 



They were isolated from infarcts 

 in a fatal case of endocarditis. 



Bacillus endocardltidis griseiis. 

 — Rods motile. 



Colonies granular and brown or 

 yellowish-brown. 



In the depth of gelatine there is 

 a filamentous growth in the track 

 ^}f the needle, and a circular whit- 

 ish patch on the surface. On agar 

 and potato the growth is greyish- 

 brown. 



Cultures cause a fatal result in 

 . mice and guinea-pigs. 



They were isolated from a case of 

 endocarditis. 

 Bacilltis enteritidis (p. 372). 



Bacillus epidermidis (Bordoni 

 UfEreduzzi). — Rods 2-8 to 3 /x in 

 length, and ■3*/x in breadth. Spore- 

 formation occurs at 26° C. 



They grow very sparingly on 

 gelatine. 



On agar there is a surface growth. 



On potato at 15° to 20° C. the 

 growth appears first in the form 

 of drops, which gradually extend 

 and coalesce and form a thin layer 



■■:;5^i 



¥k!i 



Fig. 201. — Pure Cultivatiox of Ba- 

 cillus FiGURAXS ON THE SUKPACE 

 OF XUTRIEXT AgaK-AGAK. 



over the surface. On blood serum 

 they form a thin film. 



Inoculation in rabbits and guinea- 

 pigs and on the human skin pro- 

 duced no result. 



They were isolated from flakes 

 of cuticle from between the toes. 



Bacillus erysipelatis suis (p. 

 356). 



Bacillus erythrosporus 

 (Eidam). — Slender rods and 



