ACTINOMYCETEAE 707 



Colony opaque. 



Not pathogenic for laboratory animals; isolated from calves with pneu- 



nioiiia. A. actinoides. 



Pathogenic for guinea pig; isolated from liver abscesses and pulmf)nary 



infection. A. americanus. 



Patliogenicity not stated; isolated from mycetoma of the outer ear. 



A. cylindraceus. 

 Aerobic, at least growth much better under these conditions. 



Gelatin liquefied, often serum also, not acid-fast, good growth on potato, diastase 

 often present, odor earthy or moldy, efflorescence spreading, bright, chalky, 

 growth good at 22° and 37° C, branching abundant in mycelium. 

 Serum not digested or action on serum unknown. 



Colonies deep green; from soil, pathogenic for experimental animals. 



A. viridis. 

 Colonies deep red with white margin on potato, white on agar; from 



dermatosis. A. panginensis. 



Colonies red on agar and potato; isolated from sputum, not pathogenic for 



experimental animals. A. mineaceus. 



Colonies yellow to brown. 



No pellicle on broth; from corneal infection. A. cerehriformis. 

 Pellicle often fragile on broth. 



Growth on potato; tumors in domestic fowl. 



A. tossicus. 

 No growth on potato; from lesions on sheep, producing lumpy wool. 

 Colonies white on most media. ^- dermatonomus. 



Milk not coagulated. 



On milk, growth slow, digestion in three weeks; from mycetoma 



pedis. A. mexicanus. 



On milk, forming a flesh-colored, folded pellicle with white ef- 

 florescence, only fat assimilated; from bronchopulmonary 

 infection. A. Eivierei. 



Milk coagulated. 



Growth on milk not stated, but no pellicle on other liquid media; 



from enlarged spleen. A. Gibsoni. 



No pellicle on liquid media, colony white becoming cafe-au-lait on 



potato; from black tongue. A. Guegueni. 



Pellicle on vegetable decoction only; colony chestnut color on 



potato; from erythrasma. A. Pinoyi. 



Pellicle on most liquid media (saprophytes). 



Colony white on potato, medium colored yellowish or brownish. 



A. goensis. 

 Colony yellowish waxy on potato, medium not colored. 



A. Christophersoni. 

 Pellicle on milk folded, dark green; from air, pathogenic for 



experimental animals. A. pyogenes. 



Pellicle on milk yellowish. 



From sputum. A. gypsoides. 



From water and laboratory contamination. 

 Serum digested. ^- invulneralilis. 



Colony white or grayish on most media. 



Colony rose, cerebriform on glycerol agar. A. roseus. 



