THE CLASSIFICATION OF BACTERIA 57 



Gelatin stab. Very little growth either in depth or on the surface. 



Bouillon. Without sugar, very slight growth. 



Glucose bouillon. In 12 hours at 37 C. a general turbidity; medium 



rendered acid. No gas produced. 

 Milk. No fermentation. 

 Pathogenesis : With white mice results variable. One cc. of culture injected 



intraperitoneally may give a marked diarrhoea. The organism in blood 



and stools. 

 Habitat. Isolated from stools in cases of infant diarrhoea. 



3. Str. capsulatus Binaghi 



Centralblatt f. Bakteriologie, XXII, 1897, 273. 



Morphology. Cocci in long chains. In animal body with a capsule. Stain 

 by Gram's method. 



On gelatin and other media, no development. 



Agar slant. At 37 C., transparent dewy colonies. 



Pathogenesis. Guinea pigs inoculated subcutaneously with purulent matter 

 containing the cocci show at point of inoculation a gelatinous hemor- 

 rhagic diffuse oedema. Spleen, liver, and kidneys enlarged. Inocula- 

 tions with cultures give negative results. 



Habitat. Isolated from a case of peribronchial pneumonia, with multiple 

 abscesses. 



4. Str. Cappelletti 



Str. equi Capelletti- Vivaldi : Centralblatt f. Bakteriologie, XXV, 1899, 251. 

 Morphology. Cocci round-oval ; occur singly, in twos and in short chains. 



Facultative anaerobic. Grow poorly at 20 C., and well at 24-3O C. 

 Gelatin colonies. Round, delicate, yellow, granular. 

 Agar colonies. Watery. 



Blood serum. A thin, grayish transparent layer. 



Bouillon in 24 hours, 37 C., shows a sediment as gray-white flocculi. 

 Pathogenic. For mice and rabbits. 

 Habitat. Isolated from pneumonic exudate, and the spleen of three horses 



which died of an epidemic form of lymphatic inflammation, gourme. 



5. Str. Kirchneri 



No name, Kirchner: Zeitsch. f. Hygiene, IX, 1891, 528. 

 Morphology. Similar to Str. lanceolatns, but elements round and smaller ; 



with a capsule. 

 Decolorized by Gram's method. 



