TRICHOPHYTON Em 



989 



Classification. — The various genera belonging to this tribe may 

 be recognized as follows :^ — 



A. In lesions only mycelial filaments and no spores present— Genus Lopho- 



phyton Matruchot and Dassonville, 1899. 



B. In lesions mycelial filaments and spores present:— 



I. In cultures no conidial-bearing hyphse found. Do not attack hairs 

 or hair follicles, but grow in the superficial or deep strata of the 

 epidermis. 



[a) Pluriseptate spindles present in cultures. Grow in the super- 



ficial strata of the epidermis, do not attack hairs. Cultures 

 not faviform — Genus Epideymophylon Lang, 1879. 



[b) Pluriseptate spindles unknown in cultures. Grow between the 



superficial and deep layers of the epidermis. Cultures favi- 

 form — Genus Endodermophyton Castellani, 1909. 

 II. In cultures conidial-bearing hyphae present. Ma,y or may not attack 

 hairs or hair follicles. 

 [a) Conidia only at the ends of hyphss ; large — Genus Montoyella 

 Castellani, 1907. 



ib) Conidia only at the sides of hyphas; not large — Genus Pinoyella 

 Castellani and Chalmers, 191 8. 



[c) Conidia at the ends and sides of hyphas : — ■ 



1. In cultures fusiform bodies present as septate or non-septate 



spindles. Yellow favic scutula not present in lesions: — 



(a) Conidia on short stalks: — 



(1) Attack hairs or hair follicles: — 



(i.) Grows in and on the surface of the hair. Is 

 often pyogenic and of animal origin — 



- Genus Ectotrichophyton Castellani and 



Chalmers, 191 8. 



(ii.) Grows mainly in the hair, but a few mycelial 

 filaments and spores can be found out- 

 side the hair. Not pyogenic; of human 

 origin — Genus Neotrichophyion Castellani 

 and Chalmers, 191 8. 

 (iii.) Grows entirely in the hair, and filaments and 

 spores cannot be found outside it. Not 

 pyogenic, except most rarely. Of human 

 origin — • Genus Trichophyton Malmsten, 

 1845. 



(2) Do not attack hairs or hair loUicles — Genus 



Atrichophyton Castellani and Chalmers, 191 8. 



(b) Conidia sessile- — Genus Microsporum Gruby, 1843. 



2. In cultures fusiform bodies present in the form of swollen 



claviform ends of filaments. Yellow favic scutula present 

 in lesions — Genus A chorion 'Remsi]^, 1845. 



Fig, /^g^.— Trichophyton currii, Chalmers and Marshall, to show Fungus 



IN Hair. 



