Ultrastructure of Sarcocystis booliati Dissanaike and Poopalachelvam, 1975 from the moonrat, Echinosorex gymnurus, in Malaysia |
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Authors: | S.P. Kan A.S. Dissanaike |
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Affiliation: | Department of Parasitology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia |
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Abstract: | The ultrastructure of the cyst wall and zoites of Sarcocystis booliati from the moonrat Echinosorex gymnurus, was studied with the electron microscope. The primary cyst wall was thin, smooth and filled with a finely-granular, electron-dense material. The surface of the cyst wall had a row of vesicular invaginations. The ground substance beneath the primary cyst wall did not extend into the cyst to form septae. The zoites were covered with a double-layered membrane or pellicle and had an anterior conoid, 2 conoidal rings, 22 subpellicular microtubules, about 8 rhoptries, 50–60 micronemes, scattered lipid droplets, a micropore and a posteriorly situated nucleus, in front of which was a sac-like mitochondrion with vesicular internal cristae. The distinctive features in the ultrastructure of S. booliati were the thinness of the cyst wall, the absence of cytophaneres or trabeculae and the comparatively small number of micronemes in the zoites. |
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Keywords: | conoid cyst wall cytophaneres endodyogeny ground substance invaginations micronemes micropore microtubules mitochondria moonrat: nucleus ridges rhoptries trabeculae ultrastructure zoite C conoid CR conoidal ring DM degenerating mitochondrion GS ground substance G granules IM inner membrane IV invaginations LD lipid droplets M mitochondrion MF muscle fibre, ML, muscle layer MN microneme MP micropore MS membraneous structures MT microtubules N nucleus OM outer membrane PCW primary cyst wall R rhoptries SCW secondary cyst wall Z zoite |
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