2oi8 PYOGENIC DERMAL INFECTIONS 



A. Primary lesions usually small : — 



I. Situate typically in axillary and crural regions, with- 

 out crusty lesions — Pyosis mansoni. 

 II. Situate on arms^and legs, with thick crusty lesions— 



Pyosis tropica.^ 

 III. Situate on palms; rare; no crusty lesions — Pyosis 

 Wipalmaris. 

 - B. Primary lesions usually large : — 



I. Typically bullae without bright yellow crusts — Pyosis 

 corletti. 



II. Typically large vesicles forming circular bright yellow 

 crusts — Pyosis discoides. 



Pyosis Mansoni. 



Synonym. — Pemphigus contagiosus (Manson). 

 Definition,— Pyosis mansoni is a pyosis with primary lesions, 

 usually small, but mixed with bullae and affecting the axillary and 



Fig, 794. — Pyosis Mansoni. 



scroto-crural regions. It is very common^ in the damp regions of 

 the tropics. 



Historical and Geographical. — ^This dermatosis was first described 

 by Manson under the term pemphigus contagiosus. It is very 



