Eimeria christenseni sp. n. and Other Coccidia (Protozoa:Eimeriidae) of the Goat

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Abstract
Three species of Eimeria were found in the feces of a kid with lesions of coccidiosis in the small intestine. Their oocysts are described in detail. All had a cap over the micropyle. Those of E. arloingi were ellipsoidal or slightly ovoid, measured 22-31 x 17-22 [mu] and contained elongate ovoid sporocysts measuring 12-16 x 6-8 [mu]. Those of E. crandallis were ellipsoidal, 20-27 x 17-20 [mu], and contained broadly ovoid sporocysts measuring 10-12 x 6-8 [mu]. Those of E. christenseni were ovoid, 34-41 x 23-28 [mu], and contained broadly ovoid sporocysts measuring 14-16 x 8-10 [mu]. Endogenous stages in the small intestine included macrogametes, microgametocytes and oocysts in the epithelial cells of the villi, and giant schizonts up to 280 by 150 u and containing about 100,000 merozoites in the lacteals. These were most likely E. arloingi. In addition, small schizonts 10-14 by 9-10 [MU] and containing 16-22 merozoites were found in the epithelial cells of some glands of Lieberkuhn in the jejunum. The species to which they belong is unknown. The need for careful morphologic, histologic and cross-transmission studies to determine the relationship of sheep and goat coccidia is emphasized.

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