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Therapeutic and prophylactic efficacy of the Ivomec SR Bolus against nematodes and Psoroptes ovis in cattle weighing more than 300 kg at the time of treatment

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Abstract

Three trials using 50 European breed cattle were conducted to evaluate the therapeutic and prophylactic efficacy of the Ivomec SR Bolus against nema todes (2 trials) and Psoroptes ovis (1 trial) in cattle weighing more than 300 kg at the time of treatment. The Ivomec SR Bolus proved to be highly effective against economically important gastrointestinal and pulmonary nematodes (Ostertagia ostertagi, Trichostrongylus axei, Cooperia punctata, Oesophagostomum radiatum, Dictyocaulus viviparus) and improved the rate of weight gain significantly. P. ovis was eliminated from cattle treated with an Ivomec SR Bolus. The treatment also provided prophylaxis against an infestation of P. ovis and increased the weight gain of cattle infested with P. ovis.

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Authors and Affiliations

  1. Merck Research Laboratory, Kathrinenhof, Walchenseestrasse 8-12, D-83101 Rohrdorf, Germany Fax: +49-8032-1310, , , , , , DE

    Steffen Rehbein & Dietrich Barth

  2. Merck Research Laboratory, Highfield Farm, Mangrove Lane, Hertford, Herts SG13 8QJ, UK, , , , , , GB

    Simon R. Pitt

  3. Merck & Co., Inc., P. O. Box 2000, Rahway, NJ 07065, USA, , , , , , US

    Wayne K. Langholff & Jane S. Eagleson

Authors
  1. Steffen Rehbein
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  2. Simon R. Pitt
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  3. Wayne K. Langholff
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  4. Dietrich Barth
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  5. Jane S. Eagleson
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Received: 7 March 1997 / Accepted: 15 March 1997

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Rehbein, S., Pitt, S., Langholff, W. et al. Therapeutic and prophylactic efficacy of the Ivomec SR Bolus against nematodes and Psoroptes ovis in cattle weighing more than 300 kg at the time of treatment. Parasitol Res 83, 722–726 (1997). https://doi.org/10.1007/s004360050327

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  • DOI: https://doi.org/10.1007/s004360050327

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