chapter  4
Eimeria: Infections of the Intestine
WithMary Agnes Fernando
Pages 14

Sporozoites of members of the genus Eimeria enter their respective hosts by penetrating epithelial cells of the intestinal mucosa. While most undergo endogenous development within the intestine, the life cycles of a few species occur at extraintestinal sites, e.g., E. stiedai in the biliary epithelium of the rabbit, E. truncata in the tubular epithelium of the goose kidney and Eimeria species of fish in epithelial and nonepithelial cells of the liver, kidney, and pancreas. Extraintestinal development has also been reported for species of Eimeria that normally occur within the intestine. Both asexual and sexual stages of E. arloingi and E. christenseni were found in the mesenteric lymph nodes, 1 asexual and sexual stages, including oocysts, of E. rechenowi and E. gruis in bronchial epithelial cells in the lungs of sandhill and whooping cranes, 2 and schizonts of E. tenella in the liver of chickens treated with corticosteroids. 3