MASTIGOPHORA 759 



Two other forms of dermal leishmaniasis have been described ; the 

 first, due to Leishmania braziliensis, occurs in many parts of South 

 America. The parasite is morphologically identical with Leishmania 

 tropica. Since the disease is always contracted in the virgin forest, 

 one name for the affection is forest yaws ; uta and espundia are prob- 



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* 



FIG. 179. LEISHMANIA INFANTUM. (Army Med. School Collection, Washington. 



D. C.) 



ably different clinical forms of the same disease. The transmitting 

 insect cannot well belong to the household vermin or domestic insects ; 

 sylvan insects such as the ixodides, tabanides, simulids, mosquitoes and 

 Conorhinus are all suspected of being carriers. 



The second form is called Leishmania nilotica (Brumpt, 1913), 

 and is found in non-ulcerating keloid nodules in Egyptian negroes. 

 Morphologically, the parasite is indistinguishable from Leishmania 

 tropica. 



