17 



THE OEGANISM IS A MICEOOOCCUS. 



THE GELATINE IS NOT LIQUEFIED. 



THE COLONIES AEE WHITE, NOT CONFLUENT, 

 GEOWING SLOWLY. 



THE COCCI AEE AEEANGED IN CHAINS. 



Streptococcus pyogenes, from pus ; spherical cocci, 0-4 to 1 /* in 



diameter, varying in size in different cultures, and even in the 

 same chain ; multiplying by binary division in one direction 

 only, forming chains of which the elements generally appear 

 as diplococci ; stains well by Gram ; grows slowly at the 

 ordiaary temperature as small punctiform, semi-transparent 

 colonies. Various forms of this organism have been described 

 in different diseases, as — 



StreptococcDB erysipelatos (Fehleisen), cocci in short, rigid chains, from the 



akin in a case of erysipelas. 

 Streptococcus pyogenes brevis and longns, supposed to vary as to their 



pathogenic virulence. 

 Streptococcus articulorum (Loffler), from diphtheritic false membranes ; 



large irregular cocci in long, flexible chains. 

 Streptococcus septicus (Fliigge), from foul soil ; cocci generally in pairs ; 



pathogenic for mice and rabbits. 

 Streptococcus pyogenes malignus (Fliigge), from necrotic masses in a leucae- 



mic spleen. 

 Streptococcus brevis (von Lingelsheim), from normal human saliva ; gi-ows 



more rapidly at ordinary temperature than Streptococcus pyogenes ; 



cocci in pairs or short chains. 

 Streptococcus coryzse contagiosse ettuorum, found in the pus from the 



lymphatic glands of horses suffering from the disease known in Germany 



as Drase des Pferdes. 

 Streptococcus conglomeratus (Kurth), from oases of scarlet fever ; grown in 



bouillon, the chains appear in tangled masses, single chains being 



K^re. 



Micrococcus of cattle pneumonia, cocci in short chains, surrounded 

 by a transparent capsule, which is extremely difficult to demon- 

 strate. 



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