Besnoitia besnoiti is an economically important tissue cyst-forming apicomplexan of cattle in Africa and Israel. Tissue cysts and bradyzoites of B. besnoiti from the skin of a naturally infected bull were studied by transmission electron microscopy. Tissue cysts enclosed host cell and bradyzoites. Bradyzoites were 6–7.5 × 1.9–2.3 μm in size and contained organelles found in coccidian merozoites including numerous micronemes, rhoptries, amylopectin granules, and a posteriorly located nucleus. Enigmatic bodies, characteristically found in Besnoitia sp. bradyzoites, were not observed. Therefore, enigmatic bodies should be removed as a generic character of the bradyzoites of Besnoitia species.
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1 July 2003
Ultrastructure of Besnoitia besnoiti Tissue Cysts and Bradyzoites
J. P. DUBEY,
V. SHKAP,
E. PIPANO,
L. FISH,
D. L. FRITZ
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The Journal of Eukaryotic Microbiology
Vol. 50 • No. 4
July 2003
Vol. 50 • No. 4
July 2003
cattle
enigmatic bodies
ultrastructure