An early stage in the life cycle of trypanosomes, found in invertebrates. The body is rounded and the flagellum is absent or represented by a short fibril. The kinetoplast is present.
An amastigote is a cell that does not have a visible external flagella or cilia. The term is used mainly to describe a certain phase in the life-cycle of trypanosome protozoans. It is also called the leishmanial stage, since in Leishmania it is the form the parasite takes in the vertebrate host, but occurs in all trypanosome genera.
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