ENDODERMOPHYTON TROPIC ALE 



1019 



and never show any duvet. The submerged portion is very firmly embedded, 

 and often presents projections deepening in the medium. Colour of the 

 medium unchanged. 



Glycerine Agar. — Similar growth to Sabouraud's agar. When the colonies 

 coalesce, the growth shows a knobby surface. No duvet. 



Ordinary Agar. — Scanty growth , somewhat similar to Sabouraud . No duvet . 



Mannife Agar {4 per cent ). — Appearance somewhat similar to glucose, but 

 growth less abundant. The medium may take a slight amber colour. No 

 duvet. 



Saccharose Agar (4 per cent.).- — Growth rather scanty, similar to Sabouraud. 

 Duvet absent. 



Nutrose Agar (4 per cent.). — Very slow growth. Separate young colonies 

 have a central knob; they coalesce later into a knobby mass. 



Fig. 516. — Endodermophyton tropicale Fig. 517. — Endodermophyton 

 Castellani: Agar Culture. ' /ro^?c^i/g Castellani: Mal- 

 tose Agar Culture. 



Maltose Agar {Acid). — Similar to Sabouraud. 



Maltose Agar {Alkaline). — Similar to Sabouraud. 



Adonite Agar. — Not very abundant; cerebriform; duvet absent. 



Galactose Agar. — Knobby or cerebriform. 



Levulose Agar. — Knobby. 



Raffinose Agar. — Cerebriform. 



Inulin Agar. — Cerebriform. 



Saccharine Agar (4 per cent.). — Somewhat knobby surface; duvet absent. 

 Lactose Agar. — Similar to Sabouraud, but surface growth more abundant. 

 Gelatine. — Very slow liquefaction of the medium. 



Milk. — Very scanty growth. After a time the medium becomes separated. 

 Sugar Broths {Maltose, Lactose, etc.). — Slight growth at the bottom of the 

 tube; no production of acid or gas. 



Hanging-Drop Cultures— In hanging-drop cultures (Sabouraud's 

 maltose broth) long mycelial threads are seen. Reproduction is 

 apparently by sprouts from the mycelium, branching taking place. 



Pathogenicity. — The fungus is the cause of a common type of 

 tinea imbricata. Castellani has demonstrated that the inocula- 

 tions into human beings of cultures of the fungus reproduce a typical 



