224 MEDICAL MYCOLOGY 



Colony yellowish. 



Colony elevated granular, yellow. M. Caoi. 



Colony wrinkled, yellowish amber, or brownish. M. paranigosum. 



Colony zonate. 



Arthrospores nearly all spherical. M. Muyaga. 



Arthrospores strictly cylindric, not abundant. M. Kieta. 



Arthrospores elongate ellipsoid [cylindric with rounded 



ends]. M. Issari. 



Mycoderma Nyabisi Mattlet, Ann. Soc. Beige Med. Trop. 6: 30, 31, 1926. 



Geotrichum Nyabisi Basgal, Contr. Estudo Blastomycoses Pulmonares 49, 

 1931. 



Isolated in Belgian Congo from a case of chronic bronchitis, showing 

 regular presence of cylindric cells, 3-5 x 6-8/x. 



In potato decoction, close to Mycoderma Kieta but arthrospores rare, 

 elongate, 1.5-2/a, chlamydospores barrel-shaped, 8 x S/u. 



On Sabouraud agar at 37° C, colony is white, velvety, with concentric 

 zones of alternating long and short velvet. At 25° C. the velvet is thicker and 

 the zones are less marked. The zone of propagation is moist, as in M. Issavi. 

 Filaments abundant in the medium. Gelatin stab, surface white velvety, 

 margin evenly indented. Acid formation on the second day with glucose, 

 fructose, galactose, slight with inulin, solutions becoming alkaline on nearly 

 all media on the 20th day, at least in the upper layer of the liquid. More 

 strongly acid at the bottom of the tube in glucose, fructose, galactose. Inulin 

 more strongly acid both at the bottom and immediately under the pellicle. No 

 sugars fermented. Litmus milk turns slightly acid, but does not coagulate. 

 Gelatin not liquefied. 



Mycoderma ? virulens (Norris) Dodge, n. comb. 



Saccharomycete pleomorphus virulens Norris, Southern Med. Jour. 24: 482- 

 489, 16 figs., 1931. 



Isolated from sputum in a ease of bronchomoniliasis. Toxins produced, 

 causing anemia, leucopenia, and neutrophilic depression in experimental animals. 



Cells spherical to ovoid, 2-10>, hyphae up to 50/a in length. Cells usually 

 uninucleate, though ovoid ones sometimes have 4 nuclei in old cultures. Hy- 

 phae composed of clavate cells, with large terminal cells. No true lateral 

 conidia. Arthrospores present, blastospores in clusters. Sprout cells divide 

 by amitosis, hyphal cells by karyokinesis. 



Organism killed after 15 minutes at 58° C. Direct sunlight killed in two 

 hours, inhibited growth in one hour. ''Ultraviolet light not harmful." Killed 

 by metaphen 1:64,000; iodine, 7% solution in 1:120 dilution; half saturated 

 KI ; gentian violet 1 :25,600. 



Colony white, center elevated, wrinkled, slightly yellow; margin white, 

 very irregular and feathery. Growth on glucose agar white with yellow brown 

 pigment on exposure to ultraviolet light. Yellow pigment on lead agar. On 

 potato, growth slow, confluent, smooth, fine, white, not elevated. On Kracke 

 & Teasley broth, a heavy, tenacious wrinkled pellicle forms, with heavy chalky 



