8o6 



Sporotrichosis 



their extremities or on branches. They are arranged in cylindrical 

 cuffs about 10 IX in size and in glomeruli. As a matter of fact the 

 spores are readily isolated from one another. They arise one by one 

 in variable numbers along the mycelium, but as a rule in very large 

 quantity in each segment of the thallus. There is no apparent order 

 in their arrangement. So long as it reniains on the filament the spore 

 appears pear-shaped. It is attached by a very fine sterigma, from 

 1—2 /i in length and about 0.5 n in width. When shed^ the spore is 

 oval. Its dimensions vary from 3-5-6 ix in length and from 2-3—4 11 

 in breadth. The form, the distribution and the brown color of the 

 spores and their fructification in the form of cylindrical cuffs, ar- 

 ranged in branches at the extremities of the filaments, constitute 



Fig. 328. — Sporothrix schenckii. 

 Margin of living hanging-drop cul- 

 ture (gelatin) X about 150 (Hektoen 

 and Perkins in "Jour, of Exper. 

 Med."). 



Fig. 329. — Sporothrix schenckii. 

 Slant culture on glucose agar, eight 

 days old (Hektoen and Perkins, in 

 "Jour, of Exper. Med."). 



together with the original substratum of the fungus, a group of 

 characters which differentiates Sporotrichum beurmanni sharply 

 from all other sporotrichs (Matruchat). 



Hektoen and Perkins thus describe Sporotrichum schenckii: The 

 threads of the mycelium are seen to be doubly contoured; the proto- 

 plasm is somewhat granular and interrupted at fairly regular inter- 

 vals by transverse septa; the diameter of the threads varies some- 

 what, the average being about 2 n ; the branches are not frequent and 

 do not bear any fixed relations to the septa. In the hanging-drop 

 cultures the relations of the conidia to the mycelium are very nicely 

 shown. The spore-bearing branches which grow out in a radiating 

 manner from the central felt work, ar€ commonly tipped by a cluster 



