FAMILY STREPTOMYCETACEAE 



965 



round portions; after 15 days, irregular 

 wispy flocculi and large coherent mass. 



Milk: Coagulation; no peptonization; 

 initial pinkish-brown ring descends until 

 medium is dark brown throughout 

 (2 months). 



Litmus milk : Blue coloration, hydro- 

 Ij'zed to clear purple in 2 months. 



Starch not hydrolyzed. 



Tyrosine agar: Reaction negative. 



Source : Blood culture of a woman with 

 acholuric jaundice. 



Habitat: From human infections so 

 far as known. 



71. Streptomyces somaliensis (Brumpt) 

 comb. nov. (Indidla somaliensis Brumpt, 

 Arch. Parasit., Paris, 10, 1906, 489; 

 Discomyccs somaliensis Brumpt, Precis 

 de Parasitologic, Paris, 2nd ed., 1913, 

 967; Indiellopsis somaliensis Brumpt, 

 ibid.; Nocardia somaliensis Chalmers 

 and Christopherson, Ann. Trop. Med. 

 and Parasit., 10, 1916, 239; Strepiolhrix 

 so7nalie7isis Miescher, Arch. Derm. Syph- 

 ilis, 124^ 1917, 297; Actinomyces somalien- 

 sis St. John-Brooks, Med. Res. Council 

 Syst. of Bact., London, 8, 1931, 75.) 

 Named for the country of origin, French 

 Somaliland. 



Description from Erikson (Med. Res. 

 Council Spec. Rept. Ser. 203, 1935, 17). 



Simple branching unicellular mycelium 

 with long straight filaments, forming cir- 

 cumscribed colony crowned with short 

 straight aerial mycelium. 



Gelatin: Cream-colored colonies, me- 

 dium pitted; complete liquefaction in 

 10 days ; hard black mass at bottom. 



Agar : Abundant yellowish granular 

 growth wdth small discrete colonies at 

 margin; later growth colorless, colonies 

 umbilicated. 



Glucose agar: Poor growth, moist 

 cream-colored elevated patch. 



Glycerol agar: Abundant growth, 

 minute round to large convoluted and 

 piled up masses, colorless to dark gray 

 and black. 



Ca-agar : Round cream-colored colonies, 

 depressed, umbilicated, piled up, thin 



white aerial mycelium; colonies become 

 pale brown. 



Potato agar : Small round colorless 

 colonies, zonate margin depressed, con- 

 fluent portion dark greenish-black. 



Blood agar : Small dark brown colonies, 

 round and umbilicated, piled up con- 

 fluent bands, reverse red-black; hemol- 

 ysis. 



Dorset's egg medium : Extensive color- 

 less growth, partly discrete; becoming 

 opaque, cream-colored, very wrinkled; 

 later rough, yellow, mealy, portion liquid. 



Serum agar: Spreading yellow-brown 

 skin, intricately convoluted. 



Inspissated serum : Cream-colored 

 coiled colonies, medium pitted, trans- 

 parent and slightly liquid. 



Broth : A few round white colonies at 

 surface, numerous fluffy masses in sedi- 

 ment ; later large irregular mass breaking 

 into wisps. 



Synthetic sucrose solution: Minute 

 round w^hite fluffy colonies in sediment ; 

 after 17 days, scant wispy growth. 



Milk: Soft semi-liquid coagulum which 

 undergoes digestion; heavy wrinkled 

 surface pellicle, completely liquefied in 

 12 daj^s. 



Litmus milk : Soft coagulum, partly di- 

 gested, blue surface ring; clear liquid 

 in 12 days. 



Potato plug : Abundant growth, colonies 

 round and oval, partly piled up in 

 rosettes, frosted with whitish-gray aerial 

 mycelium, plug discolored; after 16 days, 

 aerial mycelium transient, growth nearly 

 black. 



Although Streptomyces somalie7isis has 

 been known for a long time, there has 

 been until recently no detailed descrip- 

 tions of the organism beyond the fact 

 that it possesses a distinctly hard sheath 

 around the grain which is insoluble in 

 potash and eau de javelle. The rare oc- 

 currence of septa and occasional inter- 

 calary chlamydospores is reported by 

 Brumpt (Arch. Parasit., 10, 1905, 562), 

 but has not been confirmed by Erikson 

 (loc. cit.). Chalmers and Christopherson 

 (Ann. Trop. Med. Parasit., 10, 1916. 22-^) 



