ACTINOMYCETEAE 741 



ceases at 50°, although five minutes at 75° C. did not kill it. Acid-fast, losing 

 this property in old cultures, all save the arthrospores, which remain gram- 

 positive and acid-fast. 



On agar, a snow white, dry efflorescence forms, becomes delicate pale 

 coral pink, is not adherent. On potato, with or without glycerol, there is 

 copious dry, chalky growth, circumscribed, granular, verrucose in age ; sur- 

 face never wrinkled. On the third day, it assumes a coral tint which is espe- 

 cially evident under the efflorescence. On gelatin, small, white, circular colo- 

 nies at the surface. In broth, spherical white floating colonies, the emerged 

 portion turning a powdery pink, the remainder white and woolly. No pellicle 

 but a slight ring which settles to the bottom. Medium clear and odorless. 

 Milk not coagulated but digested, becoming alkaline. No growth on serum. 

 Gelatin not liquefied. 



Actinomyces carneus (Rossi-Doria) Gasperini, Centralbl. Bakt. 15: 684, 

 1894. 



StreptotJirix carnea Rossi-Doria, Ann. Inst. Ig. Sperim. Univ. Roma 1: 

 399-438, PI. 8, 1891. 



Nocardia carnea Castellani & Chalmers, Man. Trop. Med. ed. 2, 818, 1913. 



Discomyces carneus Neveu-Lemaire, Precis Parasitol. Hum. 42, 1921. 



Osopora carnea Sartory, Champ. Paras. Homme Anim. 810, 1923. 



Originally isolated from the air. Reported by Boldoni from a case of 

 chronic bronchitis. Pathogenic to rabbit and guinea pig, producing pseudo- 

 tuberculosis. Gram-positive. 



On agar, colonies small, globular, flesh or orange red in color, with rose 

 white efflorescence. On potato, growth granular, color as on agar, but 

 efflorescence reddish. In broth, scales at the surface, flocci at the bot- 

 tom of the tube. In milk, flesh-colored growth on surface. No coagulation. 

 Colonies on gelatin radiate with pink efflorescence, no liquefaction. 



Actinomyces minutissimus (Burchard) Brumpt, Precis Parasitol. ed, 4, 

 1199, 1927. 



Microsporon minutissimum Burchard & Barensprung in Uhle & Wagn. 

 Pat. Gen. 1859; Balzer, Ann. Derm. Syphiligr. II, 4: 681-688, 1883. 



Trichothecinm sp. Neumann, 1868. 



Microsporon gracile Balzer, Ann. Derm. Syphiligr. II, 4: 681, 1883. [Balzer 

 refers to this name as previously used (cf. Besnier) in France. No reference 

 to publication.] 



Sporotrichum minutissimum Saccardo, Syll. Fung. 4: 100, 1886. 



Microsporioidcs minutissimus Neveu-Lemaire, Precis Parasitol. 1906. 



Discomyces minutissimus Verdun, Precis Parasitol. 1907. 



Oospora minutissima Ridet, Oospora et Oosporoses 68, 1911. 



Nocardia minutissima Verdun, Precis Parasitol. 1912 ; Castellani & Chal- 

 mei-s, Man. Trop. Med. ed. 2, 819, 1913. 



Reported as the etiologic agent of erythrasma. 



