2026 



PYOGENIC DERMAL INFECTIONS 



A vaccine prepared from a case of Pyosis corletti acts also generally on cases 

 of Nile boils, and vice versa-. This is easily understood, as the two conditions 

 are due to the same organism — Aurococcus mollis (Dyar). 



Prophylaxis. — The important points in the prophylaxis are to 

 realize that the disease may originate from a case of boils, may cause 

 no symptoms, and may be overlooked. 



Pyosis Discoides. 

 Definition. — Pyosis discoides begins as a generalized vesicular 

 eruption of fairly large roundish vesicles, which rapidly become 

 purulent and then dry, forming circular, discoidal, bright yellow 

 crusts surrounded by a slightly hypersemic zone and associated with 

 pyogenic cocci, and in the early stages often accompanied by shght 

 fever. 



Historical.^ — This eruption was found by Castellani in 19 14, (in a 



man in Ceylon, and again in the Balkans. 



Fig. 797. — Pyosis Discoides. 

 (From a rough sketch made by an Austrian prisoner in Macedonia.) 



^Etiology. — streptococci and staphylococci have been found in the 

 lesions. 



Symptomatology.— The symptoms may be discussed in two 

 stages: — 



Vesicular Stage. — There is a profuse generalized eruption of fairly 

 large roundish vesicles, some of which are flaccid. 



Stage of Discoidal Crusts.- — ^The contents of the vesicles are at 

 first clear, but soon become purulent, and then dry up, forming 

 circular, discoidal, bright yellow crusts, firmly embedded in the 



