On Microeoccits Pasteuri. By Dr. G. M. Sternberg. 395 



the organism as it appears in the blood of an infected rabbit, or 

 in active growth in a culture-medium, when stained with one of the 

 anilin colours. There is no localization of the staining material at 

 the ends, as in the microbe of fowl-cholera and rabbit septicaemia ; 



Fig. 77. 



Fig. 78. 



Surface culture of M. Pasteuri show- Surface culture of M. Pasteuri from 



ing development of long chains. Same blood of rabbit injected with pneu- 

 amplification. monic sputum, showing the so-called 



" capsule " of Friedlander. Same 



amplification. 



and the appearance of diplococci is not deceptive as in the case of 

 that organism. Our M. Pasteuri, although when in active growth 

 of an oval form, and often so elongated as to be lance-oval or rod- 

 shaped, is nevertheless a micrococcus. In surface cultures, where 



Fig. 79. 







Fig. 80. 



<rfiuO^0 





From a photo-micrograph made by 

 the author of this paper in 1881, and 

 used in April of that year to illustrate 

 a paper on " A fatal form of septicemia 

 in the rabbit induced by the sub- 

 cutaneous injection of human saliva." 

 The preparation is from the blood of 

 a rabbit recently dead, and is stained 

 with an aqueous solution of iodine and 

 potassic iodide. Magnified 1000 dia- 

 meters. Photographed with Zeiss's 

 1/18-in. horn. im. objective. 



the development is less rapid than in the blood of a rabbit or in a 

 suitable liquid culture-medium, it commonly approaches more 

 nearly a spherical form, and frequently grows into chains of con- 



2 D 2 



Copied from illustration accom- 

 panying the paper of Salvioli in the 

 ' Archivio per le Scienze Mediche,' 

 Turin, vol, viii., No. 7, fig. 2. -' Cells 

 of the pleuritic exudation containing 

 pneumonia-cocci, mounted in Canada 

 balsam." Stained with gentian violet. 

 Amplification not stated (about 1000, 

 G. M. S.). 



