214 



General Biology 



The skin lesions are chronic and consist of nodules, abscesses, and 

 ulcerations. 



DISEASES CAUSED BY FUNGI OF MORE OR LESS 

 UNCERTAIN POSITION 



Actinomycosis or lumpy jaw. 



SPOROTRICHOSES 



The Sporotrichoses. 



(a) Subcutaneous. Small solid nodules, becoming abscesses, ulcer- 

 ating the skin. 



(b) Cutaneous. Principally in arms, hands and legs, though it 

 may occur on other parts of the body. Ulcers form in groups of two or 

 three. 



(c) Localized, hard and eroded on surface. 



Fig. 104. Sporotrichum Beurmanni. (After Brumpt.) 



1, Single lateral conidiospore; 2, terminal conidiospores; 3, 

 collection of laterial conidiospores. 



The parasite (Fig. 104) is introduced by accidental inoculation, and 

 possibly through the eating of grains and fruit. It acts like bacteria, 

 producing toxins, toward which toxins there are active reactions of the 

 body-fluids. It is a short rod 3 to 5 microns long and 2 to 3 microns 

 in breadth. In cultures it grows in filaments of about 2 microns in 

 diameter and forms characteristic ovoid spores. 



The points of differentiation between the various forms of this 

 organism are due largely to the variation in its modes of sporulation. 



