The reappearance of eggs in faeces of horses after treatment with ivermectin von Borgsteede, F.H.M. (Centraal Diergeneeskundig Inst. DLO, Lelystad (Netherlands)), Boersma, J.H, Gaasenbeek, C.P.H, Burg, W.P.J. van der

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The prevalence of anthelmintic resistance of horse strongyles in the Netherlands von Boersema, J.H. (State Univ. Utrecht (Netherlands). Dept. of Infectious Diseases and Immunology), Borgsteede, F.H.M, Eysker, M, Elema, T.E, Gaasenbeek, C.P.H, Burg, W.P.J. van der

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A comparison of the efficacy of four different long-acting boluses to prevent infections with Dictyocaulus viviparus in calves von Borgsteede, F.H.M. (Centraal Diergeneeskundig Inst., Lelystad (Netherlands)), Leeuw, W.A. de, Burg, W.P.J. van der

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Endoparasitic helminths of the harbour seal, Phoca vitulina, in the Netherlands von Borgsteede, F.H.M., Bus, H.G.J., Verplanke, J.A.W., van Burg, W.P.J.

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Comparison of a levamisole sustained-release bolus and ivermectin treatment to prevent bovine lungworm infection von Borgsteede, F. H. M., Burg, W. P. J. v. d., de Leeuw, W. A., Cornelissen, J. B. W. J., van Dijk, J. E.

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