748 MEDICAL MYCOLOGY 



the surface of gelatin. Litmus milk shows no change in 6 days, then slight 

 alkalinity with thin pellicle on surface; caseinogen digested. In broth, sur- 

 face growth only as a wrinkled, pale yellow pellicle with faint turbidity in 

 medium. No action on sugars. 



Actinomyces canis (Rabe) Gasperini, Centralbl. Bakt. 15: 684, 1894. 



Cladothrix canis Rabe, Berlin. Tierarztl. Woch. 1888. 



Oospora canis iSartory, Champ. Paras. Homme Anim. 821, 1923. 



Streptothrix caprae Silberschmidt (1899), referred here by Chalmers & 

 Christopherson. 



Pathogenic for rabbit and guinea pig (subcutaneous and intravenous in- 

 jections produce tubercles with giant cells, rapidly becoming cheesy). 



Acid-fast, aero-anaerobic. 



Agar colony dry, verrucose, yellowish white with white efflorescence; 

 some colonies crateriform. On potato, small whitish colonies which become 

 rose brown after a while; isolated colonies round, dry, crateriform. Colony 

 on gelatin, brownish at the center, clear at the periphery, formed of very 

 slender radiating filaments. In broth, concave dry discs on surface, whitish, 

 small, farinose; slight deposit, liquid clear. On milk, pink pellicle at the sur- 

 face, no coagulation. 



Actinomyces caprae (Silberschmidt) Nannizzi, Tratt. Micopat. Umana 

 [Pollacci] 4: 50, 1934. 



Strepiothrix caprae Silberschmidt, Ann. Inst. Pasteur 13: 841-853, 1899. 



Discomyces caprae Gedoelst, Champ. Paras. Homme Anim. 174-176, 1902. 



Oospora caprae Sartory, Champ. Paras. Homme Anim. 813, 814, 1923. 



Referred to A. canis by Chalmers & Christopherson, Ann. Trop. Med. Para- 

 sitol. 10: 255, 1916. 



Found in the lungs of a goat in Switzerland. Pathogenic to rabbit and 

 guinea pig. 



Aerobic. Optimum temperature 33°-37° C. 



On 4% glycerol agar, colony dry, verrucose, shrivelled, surface brownish 

 white with a raised, irregular, brownish white farinose center, flattened to 

 subcrateriform. On Loeffler's serum, growth good, similar. On maltose pep- 

 tone agar, at 37°, spreading drab color with dull efflorescence; medium dark- 

 ening in age. On potato, colony small, whitish then rose brown, round, dry, 

 sometimes crateriform, with a white efflorescence, finely granular, medium 

 browned. On gelatin, colonies deep brown at center, lighter at margin, be- 

 coming chalky white (spore formation) ; reverse pink, wrinkled. In peptone 

 beef broth or sugared broth (2%), colonies are concave discs on surface, dry, 

 whitish, powdery, forming pellicle by coalescing, not readily sinking. Slight 

 grumous deposit. Medium clear. On milk, rose white pellicle, no coagula- 

 tion, no change in pH (litmus). Neither gelatin nor serum liquefied. 



Actinomyces bicolor Trolldenier, Zeitschr. Tiermedizin 7: 81-109, 9 figs., 

 1903. 



