SPECIES OF NOCARDIA 151 



29. Nocardia cuniculi Snijders. (Snijders, Geneesk. Tijdsch. Ned. 

 Indie, 64, 1924, 47, 75.) 



Mycelium : Large swollen cells give rise to ramifying filaments or to small 

 chains of short, thick segments which branch out into more regular hyphae ; 

 sometimes the irregular elements are beset with spiny processes before 

 giving rise to typical long, branching filaments; later the picture becomes 

 more monomorphous, and short straight aerial hyphae are borne, which 

 presently exhibit irregular segmentation. 



Nutrient agar: Small, round, elevated, cream-colored colonies, umbili- 

 cated and radially wrinkled. 



Glucose agar: Minute, colorless colonies; becoming dull pink, partly 

 confluent and piled up, few stiff, pink aerial spikes. 



Potato: Coral-pink, dry, granular growth, covered to a considerable 

 extent with white aerial mycelium, piled up in center, discrete colonies at 

 margin, pink surface pellicle on liquid and colorless colonies at base. 



Gelatin: Few flakes. No liquefaction. 



Milk: Heavy yellow growth attached to walls; solid coagulum in 1 month. 



Nutrient broth: Small and larger cream-colored, scale-like surface colo- 

 nies, abundant, flocculent bottom growth. 



Glycerol agar: Small, round, elevated, cream-colored colonies, margins 

 depressed; becoming smooth, discrete, yellowish. 



Dorset's egg medium: Scant, pinkish, smeary growth. 



Serum agar: Small, raised, cream-colored colonies, becoming confluent 

 and piled up. 



Source: Infected rabbits. 



30. Nocardia rangoonensis (Erikson) Waksman and Henri ci. (Erik- 

 son, D., Med. Research Council Spec. Rept. Ser. 203, 1935, 37.) 



Mycelium: Swollen, round initial cells, giving rise to branching hyphae 

 which segment and present slipping and angular arrangement; few short, 

 straight aerial hyphae, which later develop into a profusely branching, long, 

 waving aerial mycelium. Non-acid-fast. 



Nutrient agar: Round, lobate, umbilicated, raised, cream-coloied to 

 pale pink colonies; later, medium discolored dark brown, colonies colorless. 



Glucose agar : Convoluted, coherent, cream-colored growth, medium dis- 

 colored. After 23 days, wrinkled, biscuit-colored growth, colorless margin, 

 border white aerial mycelium, medium dark brown. 



Gelatin: Abundant, minute colonies in depths and larger, cream-colored 

 ones on surface with white aerial mycelium; brown pigment surrounding 

 growth. No liquefaction. 



Milk: Coagulation, yellow surface ring, becoming partly peptonized; 

 liquid discolored dark brown; brownish growth up side of tube. 



