254 



BACTERIOLOGY 



Bouillon. A membrane. 



Potato. Growth thick, spreading, glistening, ochreous brown. 



Pepton rosolic acid solution. Unchanged. 



Habitat. Air. 



132. B. gamma Dyar: I.e. 



Morphology. Bacilli 0.5-0.7 : 1.0-1.5 /x. 



Agar slant. Growth spreading, translucent, ochreous, concentrically marked; 



comes off in pieces under the needle. 

 Bouillon. A thick membrane. 

 Milk. Slowly peptonized. 

 Lactose-litmus. Blue, reduced. 

 Pepton rosolic acid solution. Unchanged. 

 Habitat. Air, 



CLASS VIII. WITHOUT ENDOSPORES. AEROBIC AND FACULTATIVE 

 ANAEROBIC. CHROMOGENIC, PIGMENT YELLOWISH. GELATIN 

 NOT LIQUEFIED. 



" , 

 I. Gelatin colonies large, spreading. 



A. Chromogenic function weak, pale yellow. 



133. B. subflavus Zimmerman. 



B. Chromogenic function strong, deep or golden yellow. 



1. The gelatin acquires a green fluorescence. 



134. B. fluorescens Zimmerman. 



2. Do not cause a fluorescence of the gelatin. 



135. B. flavus Adametz. 

 II. Gelatin colonies aerogenes-like. 



136. B. aurantiacus Frankland. 



137. B. flavescens Frankland. 



138. B. Winkleri. 



133. B. subflavus Zimmerman 



Bak. Trink u. Nutzwasser, 1890, 62. 



B. Jlavescens Pohl : Centralblatt f. Bakteriol., XI, 1892, 144. 



Morphology. Bacilli 0.8 : 1.5-3.0 /u,. 



Gelatin colonies. Deep colonies: round, yellowish, white. Surface colonies: 



punctiform, becoming spreading ; borders irregular. 

 Gelatin stab. On the surface, growth thin, yellowish gray. 



