244 



MANUAL OF DETERMINATIVE BACTERIOLOGY 



Optimumtemperature 37°C. 

 Source: Originally isolated from small 

 stitch abscesses and other skin wounds. 

 Habitat : Skin and mucous membranes. 



13. Micrococcus roseus Fliigge. 

 (Rosafarbiger Diplococcus, Bumm, Der 

 Mikroorganismen der gonorrhoischen 

 Schleimhauterkrankungen, 1 Aufl., 1885, 

 25; Fliigge, Die Mikroorganismen, 2 

 Aufl., 1886, 183; Neisseria roseaTrevisan, 

 I generi e le specie delle Batteriacee, 

 Milan, 1889, 32; Diplococcus roseus Eisen- 

 berg,Bakt.Diag.,3Aufl.,1891,12;MeWs- 

 mopedia rosea Dyar, Ann. N. Y. Acad. 

 Sci., 8, 1895, 354; Rhodococcus roseus 

 Winslow and Rogers, Jour. Inf. Dis., S, 

 1906, 545.) From Latin, roseus, rose- 

 colored. 



Spheres: 1.0 to 1.5 microns, occurring 

 singly and in pairs. Non-motile. Gram- 

 variable. 



Gelatin colonies : Rose surface growth 

 usually with slow liquefaction. 



Agar colonies: Circular, entire, rose- 

 red surface colonies. 



Agar slant: Thick, rose-red, smooth, 

 glistening streak. 



Broth : Slightly turbid with rose- 

 colored sediment. 



Litmus milk: Unchanged to alkaline, 

 usually reddish sediment after 14 days. 



Usually produce nitrites from nitrates. 



Potato: Raised, rose-red, smooth, glis- 

 tening. 



Starch not hydrolyzed. 



Acid from glycerol and mannitol. 



Utilizes NH4H2PO4 as a source of 

 nitrogen. 



Saprophytic. 



Aerobic. 



Optimum temperature 25°C. 



Source: Dust contamination. 



Habitat: Widespread, as it occurs in 

 dust. 



14. Micrococcus cinnabar eus Fliigge. 

 (Fliigge, Die Mikroorganismen, 2 Aufl., 

 1886, 174; Rhodococcus cinnabareus Wins- 

 low and Rogers, Jour. Inf. Dis., 3, 1906, 

 545.) From M. L., cinnabar-colored. 



Spheres: 1.0 micron, occurring singly 

 and in pairs. Non-motile. Gram-vari- 

 able. 



Gelatin colonies : Small, circular, bright 

 red, becoming cinnabar red. 



Gelatin stab : Thick, raised, rose to 

 cinnabar red growth on surface. No 

 liquefaction. White colonies along stab. 



Agar slant: A carmine-red streak. 

 Slow growth. 



Broth: Turbid. 



Litmus milk : Slightly alkaline to 

 slightly acid. 



Potato : Slowly developing vermillion 

 red streak. 



Small amount of acid from test sugars. 



Indole not formed. 



Does not utilize NH4H2PO4 as a source 

 of nitrogen. 



Nitrites produced from nitrates. 



Starch not hydrolyzed. 



Saprophytic. 



Aerobic. 



Optimum temperature 25°C. 



Source : Found as contamination of 

 cultures. 



Habitat : Usually found as a dust con- 

 tamination. 



15. Micrococcus rubens Migula. {Mi- 

 crococcus tetragenus ruber Bujwid, in 

 Schneider, Arb. bakt. Inst. Karlsruhe, 

 1, Heft 2, 1894, 215; Migula, Syst. d. 

 Bakt., ^, 1900, 177; Micrococcus ruber and 

 Rhodococcus ruber Holland, Jour. Bact., 

 6, 1920, 224; Micrococcus roseofulvus 

 Hucker, N. Y. S. Agr. Exp. Sta. Tech. 

 Bull. 135, 1928, 27; not Micrococcus roseo- 

 fulvus Lehmann and Neumann, Bakt. 

 Diag., 1 Aufl., ^, 1896, 177 and 439 ; Rhodo- 

 coccus roseoftdvus Pribram, Klassifika- 

 tion der Schizomyceten, 1933,44). From 

 Latin, rubens, ruddy. 



The following description is taken from 

 Migula {loc. cit.) and from Hucker {loc. 

 cit.) supplemented from unpublished 

 notes of the latter. Also see Breed (Jour. 

 Bact., 45, 1943,455). 



Spheres: 1.3 to 4.0 microns, average 

 size 2.1 microns, occurring in fours and 



