| Tyzzeria |
a genus of coccidian protozoa (suborder Eimeriina, order Eucoccidiida), characterized by the presence of oocysts containing eight naked sporozoites. T. pernicio´sa is highly pathogenic for domestic ducklings, being parasitic in the small intestine, especially in the upper half.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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