2i8 BACTERIOLOGY 



Bouillon. Turbid, becoming clear. 

 Pepton rosolic acid. Slightly darker in 10 days. i 



Litmus milk. Amphoteric to slightly alkaline. Indol not produced. 

 Habitat. Soil. 



33. B. alcaligenes Petruschky 



Centralblatt f. Bakteriol., XIX, 1896, 187. 



Morphology. Bacilli have perithrichic flagella. Indistinguishable from B* 

 typhosus, except in the alkaline reaction in milk (not invariably constant)- 

 Differentiated also by the serum reaction. 



Potato. Growth brown. 



Habitat. Faeces. 



34. B. Friedbergensis Gaffky-Paak 



See No. 37. 



35. B. solanacearum Smith 



U. S. Dept. of Ag., Div. Veg. Path. Bull., XII, 1896. 



Morphology. Bacilli 0.6-1.0 /u, variable; flagella several. 



Gelatin colonies. Deep : round, yellowish to brownish, granular, entire. Sur- 

 face: round, thin, white. 



Gelatin stab. In depth, growth scanty ; on the surface, growth thin, white. 



Gelatin slant. Growth white, smooth, moist, glistening, with finger-like ex-- 

 tensions into the gelatin. : ;' .; ' 



Agar slant. Growth smooth, white, moist, glistening, becoming yellowish 

 brown to brown ; agar stained brown. 



Bouillon. Zooglcea in the upper layer ; uniform turbidity on shaking. 



Potato. Growth dirty white, becoming brownish to smoke-black. 



Milk. Not coagulated, slowly saponified to a yellowish, translucent fluid. 



Litmus milk. Rendered alkaline. Grow at 40. 



Glucose bouillon. No acid or gas production. 



Bouillon. Rendered alkaline. 

 Habitat. Associated with a disease of tomato, egg-plant, and the Irish potato. 



36. B. Weichselbaumii 



B. aquatilis-sulcatus No. 5, Weichselbaum : Osterreichische Sanitatswesen, 1889. 

 B. aquatilis-sulcatus Kruse : Fliigge, Die Mikroorganismen, 1896/410. 



Morphological and cultural characters like B. typhosus. Diff. aerobic; 



in depth, in gelatin stab cultures,. little or no growth. Do not reduce 



nitrates. Non-pathogenic. 

 Habitat. Water. 



