FAMILY STREPTOMYCETACEAE 



963 



Source : From pus containing typical 

 actinomycotic granules from parotid 

 abscess. 



Habitat : From human infections so 

 far as known. 



68. Streptomyces gibsoaii (Erikson) 

 comb. 710V. {Actinomyces gibsonii Erik- 

 son, Med. Res. Council Spec. Rept. Ser. 

 203, 1935, 36.) Named for Prof. Gibson 

 of Oxford. 



Description from Erikson (loc. cit., 

 p. 15). 



Young growing mycelium branches 

 profusely at short intervals ; later grows 

 out into long frequently wavy filaments ; 

 twisted hyphae also seen on water agar. 

 Power of producing aerial mycelium 

 apparently lost. 



Gelatin : Dull white flakes sinking as 

 medium liquefies ; liquefaction complete 

 in 12 days. 



Agar: Small, cream-colored, depressed, 

 partly confluent colonies, becoming an 

 extensive wrinkled cream-colored skin. 



Glucose agar: Cream-colored wrinkled 

 membranous growth. 



Potato agar : Wrinkled glistening mem- 

 branous growth. 



Serum agar : Small moist cream-colored 

 colonies growing into medium. 



Dorset's egg medium: Small, round, 

 smooth, colorless colonies with conically 

 elevated centers. 



Inspissated serum: Innumerable color- 

 less pinpoint colonies with scant white 

 aerial mycelium at top; after 8 days, a 

 coherent wrinkled skin with brownish- 

 red discoloration at reverse, medium be- 

 coming transparent; completely lique- 

 fied, pigmented brown in 15 days. 



Blood agar: Yellowish confluent bands, 

 irregularly wrinkled, with small discrete 

 colonies, clear hemolytic zone. 



Broth : Sediment of fiocculi, some round 

 and fan-shaped colonies. 



Synthetic sucrose solution: Very deli- 

 cate white fiocculi. 



Potato plug : No growth. 



Starch not hydrolyzed. 



Milk: Coagulated; partly peptonized. 



Tyrosine agar: Negative reaction. 



Source : From the spleen in a case of 

 acholuric jaundice. Injected into a mon- 

 key, and reisolated. 



Habitat : From human infections so 

 far as known. 



69. Streptomyces beddardii (Erikson) 

 comb. nov. {Actinoinijces beddardii Erik- 

 son, Med. Res. Council Spec. Rept. Ser. 

 •203, 1935, 36.) Presumably named for 

 the surgeon who first secured the culture. 



Description from Erikson {loc. cit., 

 p. 13). 



Rapidly growing, dense, spreading 

 mycelium composed of very long slender 

 filaments, many wavy or closely coiled, 

 particularly on glucose agar; spirals less 

 marked or lacking on poorer nutritive 

 media like synthetic glycerol agar or 

 water agar. Aerial mycelium sparse, 

 short, straight on synthetic glycerol 

 agar, much slower and more plentiful on 

 glucose agar; later shows long, very fine 

 spirals breaking up into small oval co- 

 nidia; aerial h3'phae straighter and more 

 branched with shorter conidiophores on 

 starch agar. Non-acid-fast. 



Gelatin: Dull white flakes sinking to 

 bottom as medium liquefies ; liquefaction 

 complete in 8 days. 



Agar: Colorless, coherent, wrinkled, 

 membranous growth with submerged 

 margin; after 3 months, medium dis- 

 colored, scant white aerial mycelium 

 at top. 



Glucose agar: Wrinkled membranous 

 growth; after 2 months, scant white 

 aerial mycelium. 



Glycerol agar : Small, cream-colored, 

 discrete colonies becoming confluent, 

 under surface much buckled. 



Potato agar : Moist, cream-colored skin, 

 convoluted, closely adherent. 



Ca-agar: Extensive, moist, cream- 

 colored, wrinkled, membranous growth. 



Coon's agar: Scant, cream-colored, 

 membranous growth. 



Starch agar : Spreading, colorless 

 growth, considerable white aerial my- 

 celium. 



