11 



THE ORGANISM IS A MICROCOCCUS. 



THE GELATINE IS LIQUEFIED. 



THE COLONIES ARE WHITE. 



THE COCCI ARE SINGLE OR IN MASSES. 



Staphylococcus pyogenes albus, from pus, the most frequent 

 pathogenic organism present. The cocci are from '8 to '9 /i in 

 diameter, and are grouped in masses ; stains by Gram. 



Staphylococcus salivarius pyogenes (Biondi), from saliva in a case 

 of scarlet fever anginosa, by inoculation through a guinea-pig ; 

 at the room temperature it forms white opalescent colonies^ 

 liquefying slowly ; at 37° C. the colonies have a yellow 

 coloration. 



Micrococcus albus lioLuefaciens (von Besser), obtained from healthy 

 nasal mucus ; spherical cocci twice as large as Staphylococcus 

 pyogenes albus, frequently in short chains. 



Micrococcus foetidus (Klamaim), from the posterior nares ; the cocci 

 are of irregular size, frequently in chains or as dlplococoi ; the 

 liquefaction is slow, with a foetid smell. 



Micrococcus II. of Fischel, from blood in influenza ; cocci 1 to 1"25 fi 

 in diameter ; the colonies are almost microscopic ; the gelatine 

 is very slowly liquefied. 



Staphylococcus epidermidis albus ("Welch), from the epidermis, pro- 

 bably one of the most frequent organisms present upon the 

 surface of the body ; resembles Staphylococcus pyogenes albus, 

 the liquefaction is, however, very slow, and its pathogenic 

 action extremely slight. 



Staphylococcus pyosepticus, from abscess in the skin of a dog; 

 resembles Staphylococcus pyogenes albus. 



Micrococcus of Freire, from cases of yellow fever ; cocci -5 to '8 ji in 

 diameter : staining by Gram. 



