170 BACTERIOLOGY 



On solid media. Growth translucent, ochreous light orange. 



Bouillon. A slight pellicle on^the surface. 



Pepton-rosolic acid. Color deepened. A slight reduction of nitrates to 



nitrites. 

 Habitat. Air. 



126. Bact. domesticum (Dyar) 



B. domesticus Dyar : Lc., 358. 

 Morphology. Bacilli 0.5 : 1.0 fi. 

 Gelatin colonies. Large, translucent, yellowish. 

 On solid media. Growth white light yellow, spreading slowly. 

 Litmus milk. Red, becoming in 50 days blue. 

 Habitat. Air. 



127. Bact. amabilis (Dyar) 



B. amabilis Dyar : Lc, 358. 

 Morphology. Bacilli 0.7 : 0.8-1.0 ft; occur singly, in chains, and masses. 

 Gelatin colonies. Large, translucent, yellowish. 

 Agar slant. Growth white, limited, with a yellowish tint. 

 Potato. Growth thin, bright yellow. Jndol negative. 

 Pepton-rosolic acid. Unchanged. 

 Habitat. Air. 



128. Bact. lacunatum (Wright) 



B. lacunatus Wright : I.e., 435. 



Morphology. Bacilli small, short, rounded ; in pairs small clumps. 



Gelatin colonies. Deep: round, entire, slightly granular, gray-brown. 

 Surface : in 24 hours, thin, translucent, with grayish centre ; very 

 irregular deeply cleft ; microscopically, areolate grained ; colonies 

 become 4-5 mm., thin, translucent, with a yellow haziness about their 

 centres. 



Gelatin slant. Growth thin, translucent, grayish yellowish in centre. 



Bouillon. Turbid. 



Potato. Growth thin, viscid, dirty brownish. 



Litmus milk. Not coagulated, acid, becoming brownish. 



Glucose bouillon. No gas. Indol positive. No growth at 36 C. 



Habitat. Water. 



129. Bact. javaniensis (Dyar) 



B.javaniensis Dyar: I.e., 359. 

 Morphology. Bacilli short coccoid, 1. 0-1.2 fi ; occur in masses and short 



chains. 

 Agar slant. Growth thick, white, with an indistinct yellowish tinge. 



