226 ME3)ICAL MYCOLOGY 



by a short, thin, tufted velvet, white with concentric zones. On gelatin stab, 

 surface colony white, velvety, with fine radiations. In potato decoction, dense 

 deposit of yellowish, filamentous flakes. Liquid turbid, of mucus consistency. 

 Acid production with glucose, fructose, and galactose before pellicle forma- 

 tion. When pellicle covers the surface, alkali production starts, but ceases 

 when the pellicle is immersed. With maltose, sucrose, lactose, mannite, dex- 

 trin, and inulin, the trend is definitely alkaline. No fermentation. Milk turned 

 slightly acid, no coagulation. No liquefaction of gelatin. 



Mycoderma Kieta Mattlet, Ann. Soc. Beige Med. Trop. 6: 29-30, 1926. 



One of the fungi isolated from a case showing symptoms of enteritis in 

 Belgian Congo. Treatment with mild laxatives and intramuscular emetine 

 caused amelioration of symptoms. 



In potato decoction after 3 days, hyphae branched, 2.5-7/* in diameter, 

 narrowed at the septa. The young, slender hyphae are rich in protoplasm 

 and contain few fat droplets, few or no septa, and abjoint the arthrospores. 

 Secondary hyhpae arise near, but not at, the septa. The older filaments form 

 series of three or four chlamydospores each, square or slightly oblong. After 

 30 days there still remains a large quantity of mycelium. Optimum tempera- 

 ture for growth 22°-25° C. 



On Sabouraud agar at 37°, colony dull, yellow cream, with concentric 

 zones. At 25°, colony yellow, powdery; later the center becomes humid and 

 zones, alternately dull and dusty, are formed. On gelatin stab, colony at 

 surface white, velvety, mammillate at center, with fine rays toward the mar- 

 gin. In potato decoction, sediment white coalescent tufts, the liquid remain- 

 ing clear. Slight acid formation at first with glucose, fructose, and galactose. 

 After the pellicle forms, the upper portion becomes alkaline, but alkali forma- 

 tion ceases when the pellicle is immersed. No action on lactose and inulin. 

 Maltose, sucrose, mannite, and dextrin become slightly alkaline. Milk slightly 

 acidified, not coagulated. Gelatin not liquefied. 



Mycoderma Issavi Mattlet, Ann. Soc. Beige Med. Trop. 6: 26-28, 1926. 



Isolated from cases presenting symptoms of true dysentery and enteritis 

 in natives of Belgian Congo. No amebas or cysts present. Medication with 

 intramuscular injections of emetine and administration of mild laxatives gave 

 amelioration of symptoms. 



In potato decoction after 3 days at 25° C, well-developed hyphae, 

 branched, 2.5-7fi, narrowed at septa. The young, slender hyphae are rich in 

 protoplasm and contain few fat droplets, few or no septa. Secondary hyphae 

 arise near, but not at, the septa. Arthrospores cylindric when first ab jointed, 

 ends rounding later. Short, spherical arthrospores rare. After 30 days most 

 of the hyphae are changed into arthrospores. Spores of variable volume as 

 hyphae of all sizes segment. The greatest measure 30 x Ifi. No yeast forms 

 seen. Optimum temperature for growth 22°-25° C. 



On Sabouraud agar at 37°, colony cream yellow, humid, margin of radiat- 

 ing hyphae, strongly adherent to medium, later little elevations at center. 



