724 MEDICAL MYCOLOGY 



Streptothrix sp. Caminiti, Ceutraibl. Bakt. I, 44: 193-208, 4 ph., 1907. 



Isolated from the air. Found pathogenic to rabbit, guinea pig, and dog. 



Generally hyphae are present in young colonies, in old colonies bacilli- 

 form spores. Growth very slow under anaerobic conditions, diastase present. 



Colonies white, opaque, wavy, margin elevated, center umbilicate, ef- 

 florescent. On 2% glycerol agar, colonies dry, gray white, elevated, adherent. 

 Growth rapid. On potato, colonies small, umbilicate, soon confluent, white 

 or yellowish. On blood serum, colonies white, adherent. On blood serum with 

 glycerol, colonies opaque, gray green, with the medium tinted slightly violet. 

 Colonies in broth, floating both at top and at bottom, the former forming a 

 pellicle at first white, then darker, the medium remaining clear. In serum 

 broth, colonies are gray white. Colonies brown ochraceous or dark brown 

 in glycerol broth. The higher the percentage glycerol, the darker the colony 

 color on all media. On milk, a greenish pellicle, opaque and folded, forms. 

 It becomes dark green in 2 weeks. A flocculent coagulum settles. Gelatin 

 liquefied. 



This organism is near to Actinomyces alhus, to which Chalmers & Christo- 

 pherson reduce it. 



Actinomyces gypsoides Henrici & Gardner, Jour. Infect. Dis. 28: 232-248, 

 1921. 



Oospora gypsoides Sartory, Champ. Paras. Homme Anim., 802, 1923. 



Isolated from the sputum of a patient suffering from cough with pains 

 in the chest. Pathogenic to rabbits and guinea pigs. 



Colonies star-shaped. On agar, they are thin, grayish, soon becoming 

 thick, opaque, and chalky white. Surface dry and wrinkled, adhering to the 

 medium, breaking away only in large flakes. Mycelium is buff-colored below 

 the efflorescence. GroAvth on sugar agars more rapid, but otherwise similar. 

 Similar also on potato. Stratiform superficial growth on gelatin. In liquid 

 media, small snow white flakes appear, presently coalescing into a thick, 

 wrinkled, snow white pellicle and broad ring. After 2 weeks the pellicle 

 breaks and settles. No further growth occurs. In litmus milk, there is a 

 similar pellicle but with a yellowish tinge. At first alkaline and curdled, then 

 litmus reduced and casein digested in 2 weeks. Meat extract media, also 

 Dunham's peptone, darken, becoming brownish. Organism grows also on 

 Czapek agar and on soil infusion agar. No hemolysis of blood agar. Gelatin 

 liquefied. Neither serum nor Dorsett's egg medium digested. 



Actinomyces invulnerabilis (Acosta & Grande Rossi) Dodge, n. comb. 



Cladothrix invulnerabilis Acosta & Grande Rossi, Cronica Med. Quirurg. 

 Habana 19: 97-100, 1893. 



Isolated as laboratory contamination, and also from water ; not pathogenic 

 for laboratory animals. 



On agar, colonies small round dirty white, becoming dull white, margins 

 elevated, adherent to substrate ; surface with radial furrows ; reverse yellow. 

 On glycerol agar and potato, growth similar. 



