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ACTINOMYCETEAE 715 



Actinomyces Thibierg-ei (Ravaut & Pinoy) Greco, Origine des Turaeurs 

 .... 723, 1916. 



Discomyces Thibiergei Kavant & Pinoy, Ann. Derm. Syphiligr. IV, 10: 

 417-432, Pis. 2, 3, 1909. 



Nncardia Thibiergei Castellani & Chalmers, Man. Trop. Med. ed. 2, 817, 1913. 



Colinistre'ptothrix Thibiergei Chalmers & Christopherson, Ann. Trop. Med. 

 Parasitol. 10: 273, 1916. 



Oospora Thibiergi Sartory, Champ. Paras. Homme Anim. 792, 1923. 



Isolated from subcutaneous and intramuscular nodules showing very small 

 white grains in the pus. Medicated with KI. Nonpathogenic to laboratory 

 animals. 



Hyphae 0.2yu, in diameter, branched, producing bacillary arthrospores, 

 2 X 0.2/A, curved. Sclerotia 80/a in diameter, claviform formations present. 

 Organism is gram-positive and aero-anaerobe. Aerobic cultures give the more 

 filamentous forms. Optimum temperature 37°-38° C. 



On ordinary agar, colonies elevated, rugose, rooting, adherent. On mal- 

 tose agar, small white colonies. On potato-gJycerol, small, white, translucent 

 granules form. In broth, bottom growth shows white grains. Growth is best 

 when broth is enriched with egg albumen or serum. 



Perhaps the following unnamed species of van Loghem should be re- 

 ferred here : 



Streptothrix sp. van Loghem, Centralbl. Bakt. I, 40: 298-305, 1906. 



Oospora sp. Sartory, Champ. Paras. Homme Anim. 828, 1923. 



Isolated from the pus of the abscesses in a fatal generalized infection, 

 also from the sputum. Pathogenic to guinea pig and rabbit. 



Hyphae up to 40/x long, branched. Spores 4 x 0.5/x. Ends of the hyphae 

 thickened. Organism is both aerobic and anaerobic, optimum temperature 

 being 37° C, no growth at 22° C. ; gram-positive. 



In agar, colonies white, adherent, round. Anaerobic growth on glucose 

 agar shows slight, amber, irregular, convoluted colonies, 3-4 mm. in diameter. 

 No fermentation. In broth, there is a sediment of white masses up to 5 mm. in 

 diameter, no pellicle, and medium remains clear. No growth on serum, milk, 

 or potato. 



Actinomyces tenuis (Castellani) Dodge, n. comb. 



Nocardia tenuis Castellani, Brit. Jour. Derm. Syphilis 23: 341, 1911. 



Discomyces tenuis Castellani, Proc. Roy. Soc. Med. 6: Derm. 23-27, 1912. 



Cohniistreptothrix tenuis Ota, Jap. Jour. Derm. Urol. 28: [4], 1928. 



Isolated from cases of trichomycosis axillaris, flava, rubra, and nigra. 

 This species really causes only trichomycosis flava. The other colors are de- 

 veloped by bacteria living with the fungus. 



Bacillary bodies 4-10 x 1-1.5|U,, straight or bent, variously branching. 

 Gram-positive, not acid-fast (not cultivated in 1912) 



