A family of sporozoancoccidia; important genera are Eimeria and Isospora, infections by Eimeria being by far the most common and most serious in domesticated animals. [see Eimeria]
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Ei·me·ri·idae .ī-mə-'rī-ə-.dēn pl a family of protozoans of the order Coccidia that includes the genera Eimeria and Isospora of medical and veterinary importance