Bovis ISSN 2398-2993

Rumen magnets: overview

Contributor(s): Roger Blowey, Vetstream Ltd , Graham Duncanson

Introduction

  • Traumatic reticuloperitonitis (hardware disease) is a common condition of cows.
  • Rumen magnets can be a cost effective way of minimizing the risk of traumatic reticuloperitonitis.
  • Rumen magnets ‘capture’ wires or fine metal material and thus prevent damage to the rumen and reticulum, and abscess formation and complications associated with wire migration.
  • Wires and foreign bodies in the reticulum can cause discomfort and loss of production.
  • Throughout this article the word “wire” will be used to refer to any metallic/magnetic fragments ingested by a cow.

Where do foreign bodies and wires come from?

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How does wire ingestion affect the cow?

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Typical wire symptoms

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How can rumen magnets help?

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How are the magnets administered?

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Studies into the effectiveness of rumen magnet

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Advantages/disadvantages of using magnets to reduce the incidence of traumatic reticuloperitonitis

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Alternative options

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Further Reading

Publications

Refereed Papers

  • Recent references from PubMed and VetMedResource.
  • Cramers T, Mikkelsen K B, Andersen P, Enevoldsen C, Jensen H E (2005) New types of foreign bodies and the effect of magnets in traumatic reticulitis in cows. Vet Rec 157, 287-289 PubMed.
  • Schneider E (1982) Der Verweilmagnet in der Therapie der Reticulitis traumatica des Rindes. Schweiz Arch Tierheilk 124, 97-105 PubMed.
  • Wittwer F (1966) Erfahrungen mit dem Käfigmagneten in der Fremdkörpertherapie. Schweiz Arch Tierheilk 108, 621-624 PubMed.
  • Federer O (1965) Beitrag zur Behandlung der traumatischen Indigestion des Rindes. Schweiz Arch Tierheilk 107, 462-468.

Other sources of information

  • Roger Blowey (2016) Veterinary Book for Dairy Farmers. 4th edn. 5m Publishing ISBN: 9781908397775.
  • Roger Blowey & Alice Elliott  (2016) An abattoir study of ruminoreticular adhesions and retention rate of rumen magnets in cattle at slaughter. Buiatrics, Dublin, 2016.
  • Use of rumen magnets. Power point presentation by Roger Blowey.
  • Alice Elliott (2015) Assessment of reticuloperitonitis lesions in slaughtered cattle with and without intra-reticular magnets. Research project 2/ MSD Connect report.


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