Migration and ultrastructure of the acanthocephalan Echinorhynchus gadi Zoega in Müller, 1776 in intermediate host under experimental conditions.

Amphipods Eogammarus tiuschovi were experimentally infected by the acanthocephalan Echinorhynchus gadi (Acanthocephala: Echinorhynchidae). Within the first four days post-infection, acanthors of the acanthocephalan caused the cellular response of the host, which ended with their complete encapsulation on day 4 post-infection. The acanthors obtained through the experiment were examined ultrastructurally.

Encapsulation of the Acanthocephalan Sphaerirostris picae in Its Natural Paratenic Host, Lacerta agilis.

This study presents the structure of the capsule around the acanthocephalan Sphaerirostris picae (Rudolphi, 1819) Golvan, 1956, in its natural paratenic host, Lacerta agilis Linnaeus, 1758. The capsule was composed of 2 layers: a thin, dense inner layer and a loose, thick outer layer. The inner layer was formed by macrophages and multinucleated cells.