716 MEDICAL MYCOLOGY 



Macfie, Ann. Trop. Med. Parasitol. 10: 283-289, 1916, claims to have cul- 

 tivated this species on ascitic agar. Colonies translucent, colorless, with a 

 slightly opaque center ; on transplants, hyphae 0.6/* in diameter. Gram-nega- 

 tive, not acid-fast. On old colonies, hyphae gram-positive ; bacillary and 

 cocciform bodies found. On parasitized hairs, gram-negative at first, but 

 gram-positive on old infections. 



Actinomyces americanus (Chalmers & Christopherson) Dodge, n. comb. 



8treptothrix sp. Bloomfield & Bayne-Jones, Johns Hopkins Hosp. Bull. 26: 

 230-233, 1915. 



Cohnistreptothrix amcricana Chalmers & Christopherson, Ann. Trop. Med. 

 Parasitol. 10: 273, 1916. 



Isolated from a liver abscess, also from a chronic, low grade pulmonary 

 infection. No granules in the pus. Organism shows low pathogenicity for 

 guinea pigs, no general infection but local chronic infections which tend to 

 heal spontaneously. 



Organism grows best under a partial oxygen pressure, 1-2 cm. below the 

 surface. No growth at room temperature, optimum temperature 37° C. No 

 elavate forms. Hyphae 0.5ju. in diameter. Gram-positive, not acid-fast. 



Small gray colonies appear on ascitic glucose agar, 1 mm. in diameter, 

 opaque with a dark center and irregular edges. No growth on usual media. 



Actinomyces actinoides (T. Smith) Bergey, Man. Det. Bacteriol. 346, 347, 

 1923. 



Bacillus actinoides T. Smith, Jour. Exp. Med. 28: 333-344, Pis. 25-28, 1918. 



Isolated during a mild epidemic of pneumonia in calves over four weeks 

 old. Not pathogenic for laboratory animals. 



Mycelium and spherical spores reported ; elavate forms in lungs of calves. 

 Gram-negative. Optimum temperature 37° C. Organism a partial anaerobe. 



On agar, colonies minute, pale, straw-colored, with flocculent growth in 

 water of condensation. In blood serum, there is flocculent growth in the water 

 of condensation, nitrates not reduced. No growth in gelatin, broth, milk, or 

 potato. 



Actinomyces cylindraceus (Korte) Brumpt, Precis Parasitol. ed. 4, 1206, 

 1927. 



Nocardia cylindracea Korte, Ann. Trop. Med. Parasitol. 11: 205-278, Pis. 

 8, 9, 1918. 



Discomyces cylindraceus Neveu-Lemaire, Precis. Parasitol. Hum. 44, 1921. 



Oospora cylindracea Sartory, Champ. Paras. Homme Anim. 774, 775, 1923. 



Isolated from an infection of the outer ear, resembling mycetoma and con- 

 taining grains. 



Aero-anaerobic. On glucose agar shakes, cylindric or hollow spherical colo- 

 nies form in the medium, semitransparent, very adherent hyphal tips sometimes 

 enlarged but no free spores seen. Unable to subculture, acid-fast. 



On blood smear agar, to which sterile cerebrospinal fluid has been added, 

 small, pale lemon yellow, adherent colonies after smearing, appear like acid- 



