EPIDERMOPH YTON 



1015 



skin without invading the hairs and hair follicles; do not produce 

 suppuration. Reproduction takes place principally by pluriseptate 

 spindles, with, on the average, four to six cells. The septa, as noted 

 by Pinoy, may not be complete, and the cavities may communicate. 

 Spiral hyphae, as found in most species of Trichophyton, absent; 

 pectinate structures, astound in the Microsporons, absent ; no spore- 

 bearing hyphae, with lateral conidia of type Acladium, as noted 

 both in the Trichophytons and in the Microsporons. The cultures 

 undergo rapid degenerative changes, losing their characteristics, and 

 becoming covered with abundant uniform, long, whitish duvet 

 (pleomorphism) . They are not inoculable into guinea-pigs, except 

 Pinoy' s Epidermophyton simii. The species so far known have 

 been isolated from human lesions, except the Epidermophyton 

 discovered by Pinoy in monkeys. 



These species may be recognized by their growths on Sabouraud's 



A. Colour peculiar yellow — Cruris. 



B. Colour pinkish — Perneti. 



C. Colour deep red — Rubrum. 



For E. simii Pinoy, 191 1, we have created the genus Pinoyella. 



Synonyms.— Trichophyton cruris Castellani, 1905; Epidermo- 

 phyton inguinalis Sabouraud, 1907; T. castellanii 'Brooke, 1908. 



Found in cases of tinea cruris in Ceylon by Castellani, and in 

 France by Sabouraud. The fungus is very abundant in recent 

 cases, extremely scarce in old ones. The mycelial tubes in recent 

 cases are generally straight, have often a double contour, and the 

 segments are somewhat rectangular, their breadth being to 4^ jn. 

 Branching is not rare. The spores are rather large (4 to 7 

 roundish, and have generally a double contour; they do not collect 

 in clusters. In chronic cases degeneration forms of the fungus 

 are met with; the mycelium may be banana-shaped, may show 

 several constrictions, or long strings of ovoid elements may be 

 seen. 



This Epidermophyton grows well, but rather slowly, on Sabour- 

 aud's agar. The growth begins to be visible after four to eight 

 days, the colonies being at first of a peculiar yellow colour, lemon- 

 yellowish or orange-yellowish, occasionally with a greenish tinge. 

 Later they become white, with pulverulent surface, and may be 

 acuminate or crater if orm. Pleomorphism, with abundant white 

 duvet, develops quickly. 



This fungus in Ceylon is the commonest species found in cases 



Table of Epidermophytons. 



Genus. 



Specie?, 



Epidermophyton Lang, 1879, emendavit 

 Sabouraud, 1907 



agar:— 



Epidermophyton cruris Castellani, 1905. 



