Ruminant Liver Parasites

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Condemned Liver. Annual condemnation of livers of 3-4% of US cattle (25% Louisiana) at $3-5 each due to parasites.. Adult-Biliary hyperplasia, dilatation, fibrosis, calcificationMigration-Diffuse fibrosis, shrunken ventral lobe. Distribution of Fasciola in the USA. Determinants: Neutral, well buffered soils (Ca ) in alluvial river basins, prairies and coastal marshes that support Lymnaea intermediate hosts, a
Ruminant Liver Parasites

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3. Distribution of Fasciola in the USA Florida web siteFlorida web site

4. Life Cycle

6. Hosts

7. Snail Habitat

8. Hoofprint with Lymnaea

10. Fasciola egg

24. Florida pageFlorida page

27. Treatment

30. Rationale of treatment recommendations

31. Herd egg count monitoring

32. Herd sampling and examination

41. Paramphistome eggs are greyish, more pointed at the operculum end and slightly smaller, features which allow differentiation from Fasciola at fecal sedimentation examination. Paramphistomes are often found in the same herds as Fasciola and in the Southeast are transmitted by the same snail. Since they are not affected by available flukecides, they can be counted and used as a surrogate indicator of how severe Fasciola would be without benefit of control programs.


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