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Fernando Diaz

Gastrointestinal nematodes like Cooperia oncophora and Ostertagia ostertagi are widely prevalent in dairy cattle. Nematodes cause production losses through reduction in intake, growth, milk production, and mortality in heavily parasitized animals. Young animals are more often affected by nematode infections because they have not been previously exposed to parasites. Control in replacement heifers relies on farm management practices related with housing, feeding, anthelmintic treatment, and grazing management.

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