FAMILY STREPTOMYCETACEAE 



949 



36. Streptomyces albidoflavus (Rossi 

 Doria) comb. nov. (Streplotrix (sic) 

 albido-flava Rossi Doria, Ann. d. 1st. 

 d'Ig. sper. d. Univ. di Roma, 1, 1891, 

 407; Actinomyces albido-flavus Gas- 

 perini, ibid., 2, 1892, 222; Streptothrix 

 albido Chester, Man. Deterni. Bact., 

 1901, 365; Cladothrix albido-flava Mace, 

 Traits Pratique de Bact., 4th ed., 1901, 

 1097; Nocardia albida Chalmers and 

 Christopherson, Ann. Trop. Med. and 

 Parasit., 10, 1916, 271.) From Latin 

 albidus, white and flavus, yellow. 



Description from Duch^, Encyclo- 

 pedie Mycologique, Paris, 6, 1934, 294. 



Gelatin : Punctiform colonies with 

 white aerial mycelium on surface of 

 liquid; no soluble pigment; rapid lique- 

 faction. 



Synthetic asparagine agar: Growth be- 

 comes rapidly covered with white aerial 

 mycelium, later becoming whitish- 

 yellow ; brown on reverse side ; yellowish 

 soluble pigment. 



Peptone agar : Cream-colored growth 

 covered with fine white aerial mycelium; 

 yellow soluble pigment. 



Tyrosine agar: Fine growth with 

 orange-yellow on reverse side; medium 

 becomes colored j^ellowish to yellowish- 

 rose. 



Synthetic asparagine solution : Long 

 branching filaments, 0.6 micron in di- 

 ameter. Thicker aerial mycelium pro- 

 ducing irregular spores ; flaky growth 

 dropping to bottom of tube. Surface 

 growth becomes covered with yellowish- 

 white aerial mycelium; brownish on 

 reverse side; soluble pigment yellowish. 



Peptone solution: Rapid, much folded 

 growth, partly covered with white nw- 

 celium on surface of medium; soluble 

 yellow -ochre pigment. 



Milk : Rapid growth becoming covered 

 with whitish aerial mycelium; never fully 

 covering the surface ; no coagulation ; 

 peptonization begins slowly and is com- 

 pleted in 13 days, liquid becoming colored 

 yellowish-orange . 



Coagulated serum : Cream-colored 

 growth of surface becoming covered with 

 white aerial mycelium ; rapid liquefaction 

 of serum. 



Starch medium : Cream-colored growth 

 rapidly colored with yellow aerial myce- 

 lium; after 20 days growth becomes much 

 folded ; greenish on reverse side ; slightly 

 amber color in medium. 



This strain is closely related to Strepto- 

 myces albus. Develops poorly on 

 Czapek's medium without asparagine. 



Source: From dust. 



37. Streptomyces poolensis (Tauben- 

 haus) comb. nov. {Actinomyces poolen- 

 sis Taubenhaus, Jour. Agr. Res., 13, 

 1918, 446.) Named for Prof. R. F. Poole, 

 plant pathologist. 



Description from Waksman, Soil Sci., 

 8, 1919, 140. 



Fine, branching mycelium ; spirals 

 usually not seen. Conidia oval to ellipti- 

 cal. 



Gelatin stab: Liquefied, with small, 

 brownish flakes in fluid. 



Synthetic agar : Thin, colorless, spread- 

 ing growth. Aerial mycelium white to 

 gray. 



Starch agar : Restricted, cream-colored 

 growth. 



Glucose agar: Growth abundant, light 

 brown, glossy, raised center, entire. 



Plain agar: Yellowish, translucent 

 growth . 



Glucose broth : Thin, brownish ring. 



Litmus milk: Brownish ring; coagu- 

 lated; peptonized, with strongly alkaline 

 reaction. 



Potato : Thin, reddish-brown ; medium 

 becoming purplish. 



Nitrites produced from nitrates. 



Faint trace of soluble brown pigment. 



Starch not hydrolyzed. 



Aerobic. 



Optimum temperature 37 °C. 



Source : Associated with disease of 

 sweet potato. 



