Trichophytce . 15 



Menopon Latum (Giganteum) Broad M. Pigeon. 



M. Palidum. Pale M. Chicken. 



M. Biseriatum. Chicken, Pheasant, Turkey. 



M. Productum. Long M. Pheasant. 



M. PhcEOStomum. Black Mouthed M. Peafowl. 



M. Numidae. M. of Guineafowl. 



M. Obscurum. Duck. 



M. Extraneum. Stranger M. Guineapig. 



TRICHOPHYT^. (Trix hair, phyton plant.) 



TrichophytK like moulds, spores, mycelia, chaplets of spores : no spor- 

 angia. Grow on decomposing organic matter, and skin, especially what is 

 hairy, or in birds bare or scaly. Favored by youth, free secretion, dandruff, 

 damp, foul air, darkness, moulting, low condition and indoor life. On 

 surface amenable to treatment ; internally less so. Diagnosis : microscopic 

 scraping or section, oil free by ether, charred in solution of soda and carbolic 

 acid, show fungus unchanged. Steep hairs longer. Cultures in alkaline or 

 neutral bouillons. Sterilizing agents. 



These closely re,semble the moulds, having spores, mycelia 

 (filaments), and chaplets of spores, but differ in the absence of 

 true sporangia (spore cases). 



The Spore consists of an amorphous envelope (epispore), en- 

 closing a ma.ss of central protoplasm. The mycelium (filament, 

 tube), has also a homogenous wall enclosing an axis of proto- 

 plasm, which may be continuous, or broken up in segments, or it 

 may be absent for short intervals. When this segmentation is 

 regular at short intervals it gives rise to the formation of a chain 

 of spores (sporiferous tubes, sporophores, receptacles). The 

 spore is the seed, which may be preserved dry for an indefinite 

 period, without change, but which under favorable environment, 

 grows out into a filament, which may or may not be sporiferous. 

 The propagation is through the spores. 



Like their near allies, the mucorinse (moulds), the trichophytce , 

 naturally grow on decomposing organic matter, but they also 

 grow on the surface of living tissue under certain conditions of 

 the latter. On the .skin of man they show a predilection for hairy 

 surfaces, whilst on the hairy animals they affect especially the 



