LEISHMA NIA SIS—KA LA -A ZA R 



57 



An epidemic will travel slowly along lines of human commimication, 



It runs in families, the children suffering most. 



The poorer sections of the community are affected most. 



The dwelling becomes infected and will infect those close to it. 



Neither sex nor season has anv influence. 







WM. 







kx 





A 



4ff 



^ '■ is 







Leishmania donovani. i, Free forms, each with nucleus and rod-shaped blepharo- 

 plast (after Christopheis) ; 2, endothelial cell and leucocytes containing parasites (after 

 Christophers) ; j, capillary in the liver showing endothelial cells containing parasites (after 

 Christophers) ; 4, two parasites escaping from a leucocyte in the alimentary canal of the bug 

 (after Patton) ; 5, further development in bug (after Patten) ; 6, young flaggellate forms in bug 

 (after Patton) ; 7-//, culture forms (after Leishman) ; 7, 8, g, show development of flagellum. 



THE PARASITE. 



The l^eishman-Donovan " body " is a small ovoid or roundish 

 organism, 2 — 4 /i in diameter; when stained it shows two lilac- 

 coloured chromatin masses of unequal size enclosed in a c_ytoplasm 

 of a bluish tint. 



The larger mass is the nucleus, oval and centrally placed in the 



