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[Trypanosoma brucei gambiense] [T. b. rhodesiense]

A	B

A, B: Two areas from a blood smear from a patient with African trypanosomiasis.  Thin blood smear stained with Giemsa.  Typical trypomastigote stages (the only stages found in patients), with a posterior kinetoplast, a centrally located nucleus, an undulating membrane, and an anterior flagellum.  The two Trypanosoma brucei species that cause human trypanosomiasis, T. b. gambiense and T. b. rhodesiense, are indistinguishable morphologically.  The trypanosomes length range is 14 to 33 µm.