title: Experimental studies of an old strain of Trypanosoma gambiense; the enhancement of its virulence and the relationship of this phenomenon to the species of polymorphic trypanosomes of Africa.
mesh_terms: D000349:Africa; D000818:Animals; D014345:Trypanosoma; D014347:Trypanosoma brucei gambiense; D014353:Trypanosomiasis, African; D014774:Virulence
keywords: TRYPANOSOMA