Figure 1.

Trypanosoma lewisi (left) and Trypanosoma vivax (right) adult blood forms. Left: Trypanosoma lewisi has a long thin posterior end, with a sub terminal ovale kinetoplast, the nucleus is in the anterior part of the body, part of the flagellum is free; Right: Trypanosoma vivax has a round posterior end, with a terminal round kinetoplast, the nucleus is in the medium part of the body (dividing form on the right of the picture); part of the flagellum is free.