| promastigote | Term now generally used instead of "leptomonad" or "leptomonad stage," to avoid confusion with the flagellate genus Leptomonas. It denotes the flagellate stage of a trypanosomatid protozoan in which the flagellum arises from a kinetoplast in front of the nucleus and emerges from the anterior end of the organism; usually an extracellular phase, as in the insect intermediate host (or in culture) of Leishmania parasites. Origin: pro-+ G. Mastix, whip (05 Mar 2000) |
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| promastigote |
any of the bodies representing the morphological (leptomonad) stage in the life cycle of certain trypanosomatid protozoa resembling the typical adult form of members of the genus Leptomonas, in which the elongate or pear-shaped cell has a central nucleus and at the anterior end a kinetoplast and a basal body from which arises a single long, slender flagellum. Cf. amastigote, choanomastigote, epimastigote, opisthomastigote, and trypomastigote.
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