236 INFECTIVE DISEASES. 



Sternberg's Micrococcus. (Microbe de salive, Pasteur ; Micro- 

 coccus Pasteuri, Sternberg ; Lancet-shaped micrococcus, Talainon ; 

 Streptococcus lanceolatus Pasteuri, Gamaleia ; Diplococcus pneu- 

 rnonice, Weichselbaum ; Bacillus septicus sputigenus, Fliigge ; 

 Micrococcus of sputum septiccemia, Frankel.) Spherical or oval 

 cocci, singly, in pairs or in chains, often lanceolate and capsuled. 

 Stain readily with the aniline colours and by Gram's method ; 

 non-motile. They flourish in alkaline media in the incubator. In 

 broth they produce in twelve hours a cloudiness due to the develop- 



* 



FIG. 116. MICROCOCCUS OF SPUTUM SEPTICAEMIA. From the blood of a 

 Kabbit. x 1000 (FRANKEL AND PFEIFFER). 



ment of cocci and short chains. After a time these subside to 

 the bottom of the tube, and the liquid above becomes clear. In 

 plate -cultivations the colonies are small, circular, white, and granular. 

 In the depth of gelatine, minute white colonies develop along the 

 track of the needle without liquefaction of the gelatine ; and on 

 the sloping surface of nutrient agar or blood serum minute trans- 

 parent drops appear along the line of inoculation. They grow in 

 milk, coagulating casein; but they do not grow on potato. Sub- 

 cultures quickly lose their virulence, but regain it by inoculation. 



