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Tapeworms in Cattle

The anoplocephalid tapeworms Moniezia expansa and M benedeni are found in young cattle. The worms of this group are characterized by the absence of a rostellum and hooks, and the segments usually are wider than they are long. The eggs are triangular or rectangular and are ingested by free-living oribatid mites, which live in the soil and grass.

After 6-16 wk, infective cysticercoids are present in the mites. Infection occurs by ingestion of the mites; the prepatent period is ~5 wk. Moniezia are commonly considered nonpathogenic in calves, but intestinal stasis has been reported.
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