MICROSPORUM SCORTEUM 



995 



Microsporum scorteum Pdestley, 1914. 



This parasite resembles M. fulvum Uriburu, 1909, both morpho- 

 logically and culturally, and may be identical therewith, as the 

 descriptions given in Europe- of Uriburii's parasite are scanty. It 

 was found by Priestley in Townsville in Tropical Queensland; 

 and occurred in two circular inflamed areas on the calf of a boy's 

 leg. There was no scaliness, and the hairs were not visibly altered, 

 though microscopically they contained mycelium and a few spores. 



On Sabouraud's maltose agar it grew rapidly, producing a growth 

 like a piece of chamois leather. It slowly digested milk, which it 

 did not clot. Multiseptate spores were abundant, but lateral conidia 

 were few, 3-4X2-3 microns in size, while chlamydospores were in- 

 frequent. Nodular bodies like those found by Sabouraud in T. 

 lacticolor were found. Spirals were frequent and pectinate bodies 

 rare. Duvet was formed. 



Genus Trichophyton Malmsten, 1845. 



Definition. — Trichophytoneae with mycelial filaments and spores 

 present in the lesions and conidial-bearing hyphae in cultures, only 



attacking hairs and entirely 

 # " of human origin. Almost 



fiA never pyogenic. 



W - ' '^yP® Species. — Trichophyton 



% ' m\ tonsurans Malmsten, 1845. , 



#1 ''^ ^ General Considerations. — 



sA. ' ^ During their parasitic life the 



' species of the genus Tricho- 



\ 



Fig. 497. — Trichophyton currii, Fig. 498. — Trichophyton currii, 



TO SHOW Mycelial Spores. to show Conidial-bearing Hypha. 



phyton vegetate according to two types: (i) mycelial filaments; 

 (2) mycelial spores. 



The mycelial filaments consist of long cylindrical cells, separated 

 by septa. The so-called mycelial spores are simply a modification 

 of the mycelial filaments, due to the septa being much closer, so 

 that the cells limited by them are almost as broad as they are long. 

 The term ' mycelial spores ' is incorrect, as they are not organs of 

 reproduction, but only vegetative organs. 



When the shape of these mycelial spores or sporulating mycelia 

 is roundish or oval, the filament takes a moniliform appearance, 

 Moi cover, these cells are easily dissociated. Such a type is called 



