Scanning Electron Microscopy of the Cecal Mucosa in Eimeria-Tenella-Infected and Uninfected Chickens

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Abstract
Four major types of surface conformation were observed in the ceca of uninoculated control chickens. Spatulate villi were found in the cecal neck region, low ridges in the region where the neck expands, protruding collarlike structures in the mid cecal pouch, and flattened collars in the distal portion. In ceca infected with Eimeria tenella, there was some erosion and sloughing of the mucosal cells. These lesions were slight in the neck region, more severe in the dilated portion, most severe in the midregion, and moderate in the distal area. Oocysts were observed in the mucosal tissue of the cecal pouch.

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