Definition: An insect stage of Trypanosomatide infection. Term replacing “crithidial stage,” to avoid confusion with the insect-parasitizing flagellates of the genus Crithidia. In the epimastigote stage, the flagellum arises from the kinetoplast alongside the nucleus and emerges from the anterior end of the organism; an undulating membrane is present.
[epi- + G. mastix, whip]
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