322 BACTF.RI0t5GY 



Habitat. In the mouth, intestines, and on the surface of the body; in sup- 

 purating wounds; sometimes associated with peritonitis, appendicitis, in 

 phlegmons, otitis media,"bronchopneumonia, etc. 



Varieties (non-pathogenic). B. fluorescens-mutabilis Wright: I.e., 449. 

 Habitat, water. 



B. No. 21 Conn.: I.e., 1893, 52. Habitat, milk. 



These are probably only non-pathogenic varieties of the preceding, except 

 that the chromogenic function is weaker. Cultural characters otherwise 

 within the range of probable normal variations. 



29. Ps. capsulata (Pottien) 



B. Jluorescens-capsulatus Pottien: Zeitsch. f. Hygiene. XXII, 1896, 146. 



Morphology. Bacilli small, with rounded ends, scarcely one-half the length of 

 tubercle bacilli, and somewhat thicker ; often in twos, somewhat variable 

 in size, rarely coccoid. Show a polar stain. Not stained by Gram's 

 method. A capsule in the body and on media. A long, undulating polar 

 flagellum. Optimum temperature yj. 



Gelatin colonies. Deep : grayish, greenish, concentric, often with radiate 

 fibrils. Surface: brownish, granular, becoming liquefied in 4 days; a 

 greenish shimmer, with sunken surface growth ; microscopically, concen- 

 tric, the outer zone has a B. subtilis character. An odor in the liquefied 

 gelatin of musty cheese. 



Gelatin stab. Liquefaction saccate infundibuliform, becoming stratiform ; 

 the liquid gelatin becomes yellowish green bluish red. 



Agar slant. Growth moist, glistening, slimy ; a bluish shimmer, with a gray 

 green blue green fluorescence. 



Bouillon. A thick, slimy membrane, and a green fluorescence. 



Glucose bouillon. No gas. 



Milk. 37, a green fluorescence at the surface ; at 20 , coagulated in 48 

 hours. 



Potato. Growth grayish green yellowish green, slimy. Grow in acid gelatin. 

 Indol positive or scanty. Reduction of nitrates to nitrites negative or 

 scanty. 



Pathogenesis. Subcutaneous inoculation of small doses into mice cause death 

 in 1-3 days, with cramps, oedema at the point of inoculation, and inflam- 

 mation of the internal tissues. Bacilli by culture from blood and organs. 



Habitat. Isolated from a case of cholera-nostras. 



