206 Originalabhandlungen. 



to another. It is contracted more readily by young- children, than 

 by grown persons. On infants and young children it spreads ra- 

 pidly, attacking all parts of the body alike. It spreads rather more 

 rapidly on the hairy, than on other parts of the body. The plants 

 attack the hair follicles, in which they develope luxuriantly, 

 sending ofif branches aboundantly through the epidermic and 

 cuticular layers. The spores and filaments of this mucedinous 

 growth, resemble those of Trichosis furfuracae. They however 

 develop much more rapidly on the human body, — causing the 

 disease to spread in isolated patches to all parts of the surface 

 often in a few days' time. 



The patches on the scalp do not differ materially from those 

 of ordinary Trichosis furfuracae, save that the surface is, perhaps, 

 slightly more raised and inflamed , and produce more irritation. 

 On parts of the body not covered with hair, they spread less 

 rapidly, — starting from a single point, or hair follicle and exten- 

 ding in all directions, — forming circular and oval patches of 

 greater or less extent. The patches are slightly elevated above 

 the surrounding surface, red, and covered with scales and little 

 elevations, — marking the position of the hair follicles. The color 

 of the patches is deeper, and the irritation and itching more 

 severe than in ordinary TricJiosis. In less than a week after the 

 kitten affected with this disease comes in contact with a child, 

 the eruption begins to show itself upon some parts of the sur- 

 face of the latter, — usually about the hands, arms, and face, — 

 especially if the child has been caressing the kitten. Soon after 

 patches appear on the limbs and body and rapidly spread, 

 producing after an intolerable itching, — which is only partially 

 relieved by rubbing and scratching the patches. This is purely 

 a local disease, — it being contracted alike readily by the healthy 

 and fable. 



Pathology. The cells of the hair - follicles , and of the epi- 

 dermic layer between them, are shrunken and shrivelled and 

 the hairs — diminished in size — become brittle, break off 

 and crumble away. The deeper parts of these follicles become 

 enlarged often, and the hairs die, shrink and fall out. 



The cappillary vessels in the papillary layer of the skin — 

 beneath the diseased surface — become congested and enlarged 

 producing a redening of the skin and a slight elevation of the 



