176 BACTERIOLOGY 



Milk. A red growth on the surface. 



Potato. Growth glistening, light red ; slow development. Nitrates not 



reduced to nitrites. 

 Pepton-rosolic acid solution. Unchanged. 

 Habitat. Water. 



144. Bact. haematoides (Wright) 



B. hcsmaioides Wright : I.e., 448. 



Morphology. Bacilli medium-sized, blunt ; stain irregularly. 



Gelatin colonies. Deep: round, granular, yellowish red. Surface: small, 



slightly elevated to vermilion-colored disks. Gelatin liquefied after a 



long time. 

 Gelatin slant. Growth bright red, rough, glistening. 

 Acid gelatin. A strong development. 

 Agar slant. Growth pink, of confluent elevated colonies. 

 Potato. Growth bright red, wrinkled, granular, spreading. 

 Litmus milk. Not decolorized ; growth reddish ; reaction alkaline. 

 Glucose bouillon. No gas. Indol absent. No development at 36°. 

 Habitat. Water. 



144 a. Bact. amylovorum (Burrill) 



M. amylovorus Burrill; Am. Naturalist, VII, 1893, 319. 



Morphology. On agar bacilli 0.8: 1.25 /ii; occur singly and in pairs. Stain 

 uniformly with aqueous fuchsin. Non-motile, flagella absent. 



Gelatin colonies. Deep : round, entire, amorphous — slightly granular, light 

 grayish brown, o.i mm. In 5 days the deep colonies are round, entire, 

 opaque, yellowish, and about 0.5 mm. in diameter. Surface: colonies 

 minute, punctiform, white, not exceeding i mm. Microscopically, they 

 are round, entire, yellowish, opaque in centre, and granular toward the 

 border. 



Gelatin stab. In depth, a thin filiform growth ; on the surface the growth is 

 thin, leafy, whitish, irregular, glistening, and dry. 



Bouillon (neutral). In two days at room temperature a distinct opalescence,, 

 with no surface growth or.^ediment. 



Potato. In 24-48 hours, a porcelain-white, moist, glistening streak, which 

 becomes spreading and is of a slimy or watery consistency. Later the 

 growth becomes pinkish or flesh-colored. 



Milk. Unchanged. 



Litmus milk. Unchanged. 



