THE GENUS ALBOCOCCUS 2OI 



2. ALB. EPIDERMIDIS (Gordon) Winslow. A parasitic 

 coccus, living normally on the surfaces of the human or 

 animal body. Occurs singly, or in pairs, or irregular 

 groups. Generally stains by Gram. Good to abundant, 

 white surface growth. Moderate acid production in 

 lactose, maltose, and glycerin media. Nitrates and neutral 

 red reduced. Gelatin liquefied, somewhat slowly. . Mannite 

 not fermented. 



The third well-marked type of Albococcus is the form 

 which fails to liquefy gelatin. This is the organism 

 described by Gordon as appearing in a large minority 

 among the cocci of the hand and cheek. His cultures 

 exhibited marked weakness in other respects, as well as 

 in their action upon gelatin. They formed insufficient 

 acid to clot milk, did not attack glycerin at all, and failed 

 to reduce neutral red. Nine of our own twenty-three 

 strains fall in this group. 



Cohn gave the name M. candidus to a white coccus 

 which appeared on potato in his laboratory (Cohn, 1872). 

 No other characters were recorded by him; but Migula 

 describes M. candidus as a non-liquefying form. The 

 name may, therefore, be taken for the type center of non- 

 liquefying albococci, with the addition of the other 

 characters brought out by recent investigations. In the 

 light of Gordon's work, and our own, the type center may 

 be defined as follows: 



3. ALB. CANDIDUS (Cohn /Winslow. A parasitic coc- 

 cus, living normally on the surfaces of the human or animal 



