PRINCIPLES OF VETERINARY SURGERY 



113 



careful surgeon suspects its existence everywhere. It is the 

 common micro-organism of suppuration and is found in the 

 pus of many abscesses. Although suppuration is not a 

 specific disease, the staphylococcus pyogenes aureus, might, 

 with at least some propriety, be regarded as the specific mi- 

 crobe of acute abscess in domestic animals, so frequent is 

 it found in this connection. It was discovered by Ogston, 

 but was first cultivated by Rosenbach, who gave it the name 

 it has retained. 



Description. — Non-motile. Non-flagellated. Liquefying. 



Fig. S. 

 Staphylococcus Pyogenes Aureus from Artificial Culture. 



Chromogenic. Aerobic or facultative anaerobic. Non- 

 sporogenous. Size, o.yi^. Aggregated in masses. 



Cultivation. — It can be grown upon gelatin, agar-agar, 

 coagulated blood-serum and potato and in bouillon and 

 milk. Grows readily at ordinary temperatures but more 

 rapidly at about 85" Fahr. and the normal temperature of 

 the body. It peptonizes albumin, liquefies gelatin and coag- 

 ulates milk. In solid media, it grows along the tract of the 

 needle and upon the surface, and it imparts a gold-yellow 

 color to the culture by the formation of pigment. It will 

 grow either in the presence or in the absence of oxygen. 



Isolation. — The organism may easily be isolated by 



