732 MEDICAL MYCOLOGY 



odor, suggesting Camembert cheese, adherent. GroAvth on potato, straw yel- 

 low, not coloring the medium. In broth, small flocei app«iar at the bottom of 

 the tube, each being white above and yellowish white below. Medium remains 

 clear, darkening in 7-8 months. On coagulated serum, colonies small, light 

 yellow, becoming snow white after 5 days. There is some liquefaction, and 

 the colony sinks in two months, showing hard yellow grains, partly as a result 

 of incrustation by salt crystals. Gelatin liquefies in one week and the colony 

 sinks, unless it happens to stick to the walls of the tube, when it forms a white 

 partial pellicle. Liquid is clear, darkening after 7-8 months. 



Actinomyces aureus (DuBois Saint-Severin) Lachner-Sandoval, Uber 

 Strahlenpilze 66, 1898. 



Streptothrix aurea DuBois Saint-Severin, Ann. Med. Nav. Colon. 63: 253- 

 260, 1895; Semaine Med. 15: 202, 1895. 



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



Oospora aurea Sartory, Champ. Paras. Homme Anim. 812, 1923. 



Isolated from case of conjunctivitis. Not pathogenic to laboratory animals. 



Hyphae 1/i in diameter, dichotomous, with helices which break up into 

 ovoid arthrospores. Gram-positive. 



On agar, colonies thick, dry, acuminate, verrucose, convoluted, covered 

 with a white powder. Reverse yellow. On potato, colony dry, verrucose, 

 thick and yellow (color like that of gold chloride). Spores white. On coagu- 

 lated serum, colonies gray, moist, horny, liquefying substrate. On human 

 serum, colony flat, thin, circular, with alternating zones gray depressed and 

 white powdery ; reverse yellowish. On gelatin, there is a thick, contorted, 

 superficial colony, the gelatin becoming liquefied in a few days, with the center 

 depressed and darkening, the white powderj^ portion submerged and yelloAv- 

 ish. In broth, small spherical masses form on the surface and settle to the 

 bottom. Gelatin and coagulated serum liquefied. 



Actinomyces luteolus (Foulerton & Jones), Brumpt, Precis Parasitol. ed. 

 4, 1192, 1927. 



Streptothrix luteola Foulerton & Jones, Trans. Path. Soc. London 53: 75, 

 1902. 



Oospora luteola Sartory, Champ. Paras. Homme Anim. 812, 1923. 



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



Discomyces luteolus Verdun & Mandoul, Precis Parasitol. 750, 1924. 



Isolated from a ease of purulent conjunctivitis wtih sloughing of cornea. 

 Not pathogenic to ordinary laboratory animals. 



The organism is an aerobe, showing only scanty growth under anaerobic 

 conditions. Optimum temperature 37° C. Gram-positive, not acid-fast. 



On peptone maltose agar, growth is a faint drab or whitish, later becom- 

 ing faintly yellow. Colony on potato, cafe-au-lait in color, with no pigmenta- 

 tion of the medium. Efflorescence only at 37° C. GroAvth on horse serum, 

 dry and wrinkled, with a drab growth sunk in the medium. On gelatin, colony 

 opaque white faintly tinged with yellow, sinking into substrate as it liquefies. 



