Ultrastructure studies on post-oocyst development of the lizard hemogregarine Hemolivia mariae in the tick Amblyomma limbatum.
The ultrastructural features of the development of Hemolivia mariae, a blood parasite of the Australian lizard, Tiliqua rugosa, from sporokinetes to sporozoites in their vector tick Amblyomma limbatum are described. Sporokinetes, released from oocysts, re-establish themselves in tick-gut epithelial cells within a parasitophorous vacuole, the wall of which becomes evaginating and anastomosing and is underlined extensively by endoplasmic reticulum. The sporozoites forming within the encysting sporokinete body become bordered by a prominent thick wall, which eventually forms the resistant sporocyst wall. The main differences between the ultrastructural features of Hemolivia and those of other hemogregarine taxa are discussed.
Smallridge
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School of Biological Sciences, Faculty of Science and Engineering, Flinders University of South Australia, Adelaide, Australia.
Paperna
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D000818:Animals; D001096:Arachnid Vectors / Q000469:parasitology*; D016783:Eucoccidiida / Q000254:growth & development* / Q000648:ultrastructure*; D008116:Lizards / Q000469:parasitology*; D013987:Ticks / Q000469:parasitology*