CLADOSPORIUM PENICILLOIDES 



IIOI 



The optimum temperature for the growth of the fungus is between 30° C. and 

 32** C. ; above 35° C. and under 25° C. the growth is much slower, and may be 

 nil under 20° C. 



This fungus is the cause of tinea nigra (p. 2078). 



Cladosporium penicilloides Gueguen, 1911. 



Synonym. —C. Madagascariense Verdun, 1913. 



Found by Fontoynont in a patient with some ulcerated nodules 

 of the leg in Madagascar. The fungus grows easily on Sabouraud's 

 and other media, giving rise to black cerebriform colonies. In 

 hanging-drop cultures shows the typical features of the genus. 



Cladosporium herbarium Persoon has been demonstrated by Nassee to be 

 the cause of the black spots so often found on imported frozen meat. 



SUBORDER 2: ARTHROSPORINE.^: Vuillemin, 1910. 



Definition. — -Thallosporales with yeast-like forms, associated in 

 cultures with hyphse and other forms with longer hyphse. Repro- 

 duction by means of arthrospores parasitic on man. 



Remarks. — Vuillemin includes in this suborder the genera Tricho- 

 phyton, Microsporu n, Achorion, and their allies, although it is more 

 usual to consider these to be allied to the Gymnoascaceae, because 

 Ctenomyces serrata Eidam, 1880, when injected into animals, develops 

 a trichophyton-like mycelium and eruption, which classification has 

 recently been supported by the work of Marshall and one of us on 

 T. c^trrii. However, for the present, we propose to leave these 

 genera and their allies out of consideration. 



Classification. — -This suborder contains the following genera: — 



A. Producing Piedra on hairs— Genus Trichosporum Behrend, 



1890. 



B. Producing Black Maduro mycosis — Genus Madurella 



Brumpt, 1905. 



C. Producing White Maduromyco sis—Genus Indiella Brumpt, 



1906. 



Genus Trichosporum Behrend, 1890. 



Definition. — ^Arthrosporales living parasitically on the hairs of man 

 in the form of large, oval, or roundish bodies embedded in a ground 

 substance. In cultures elongated hyphae and spores are formed. 



Remarks. — 'Care must be taken not to confuse Trichosporum 

 Behrend, 1890, with Trichosporium Fries, 1849, ^ ^^^Y different 

 genus with over forty species, mostly saprophytic. 



The species of this genus give rise to nodosities on hairs. They 

 are : — ■ 



T. giganteum Behrend, 1890, the cause of piedra in Columbia, in 

 hairs of the head. 



T. beigeli (Rabenhorst, 1867), the cause of piedra in Europe, in 

 hairs of the beard. 



T. ovoides (Behrend, 1890), the cause of piedra, in hairs of the 

 moustache. 



