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A MANUAL OF BACTERIOLOGY 



ophthalmitis, and is said by Fliigge to be commoner than 

 the aureus in the lower animals. 



Chief Types of Human Micrococci. 



Andrewes and Gordon l regard the aureus, albus, and 

 citreus merely as variants of a single species, the Micro- 

 coccus pyogenes. They found that every variety of colour, 

 from orange, through yellow to white, might be obtained 

 by cultivation. The Micrococcus flavescens, met with by 

 Babes in abscesses, may probably be placed in the same 

 category. On the other hand, the Micrococcus epider- 

 midis (albus), first described by Welch as occurring on 

 the skin, in stitch abscesses, etc., and feebly pathogenic 

 compared with the M . aureus, is stated by these authors 

 to be perfectly distinct from the foregoing. Other 

 organisms which are occasionally met with in abscesses, 

 the Staphylococcus cereus albus and S. cereus flavus of 

 Passet, form shining waxy growths on agar, and do not 

 liquefy gelatin, and are probably variants of another 

 species, which may be termed the Micrococcus cereus. 



1 Rep. Med. Off. Loc. Gov. Board for 1905-06, p. 543. 



