532 



Kala-Azar 



Fig. 219. "Jericho" boil (Masterman in "Journal of Hygiene"). 



Fig. 220. Helcosoma tropicum, from a case of tropical ulcer ("Delhi sore") 

 smear preparation from the lesion stained with Wright's Romanowsky blood- 

 staining fluid. The ring-like bodies, with white central portions and containing 

 a larger and a smaller dark mass, are the micro-organisms. The dark masses in 

 the bodies are stained a lilac color, while the peripheral portions of the bodies, in 

 typical instances, are stained a pale robin's egg blue. The very dark masses are 

 nuclei of cells of the lesion. X 1500 approx. (Wright). (From photograph by 

 Mr. L. S. Brown.) 



