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Abstract

The value and application of pepsinogen, gastrin and antibody response as diagnostic tools in bovine ostertagiasis are discussed. These 3 parameters are useful and comparable for confirming clinical disease in calves during their first grazing season. However, their value for detecting subclinical...

Author(s)
Berghen, P.; Hilderson, H.; Vercruysse, J.; Dorny, P.
Citation
Veterinary Parasitology, 1993, 46, 1-4, pp 175-195
Abstract

Cooperia oncophora total adult extracts were examined by Western blotting with sera from C. oncophora- and Ostertagia ostertagi-infected calves to determine species-specific antigens. It was shown that 2 antigens with apparent MWs of 14 200 and 14 900 were only recognized by calves which received a ...

Author(s)
Graaf, D. C. de; Berghen, P.; Hilderson, H.; Cock, H. de; Vercruysse, J.
Citation
International Journal for Parasitology, 1993, 23, 1, pp 141-144
Abstract

The influence of different levels of infection with O. ostertagi on the development of a protective immune response in calves was investigated. Four groups of calves were infected with either 5000 (Group A), 10 000 (Group B), 20 000 (Group C) or 40 000 (Group D) infective larvae (O. ostertagi L3)...

Author(s)
Hilderson, H.; Vercruysse, J.; Graaf, D. C. de; Bastiaensen, P.; Fransen, J.; Berghen, P.
Citation
Veterinary Parasitology, 1993, 47, 3-4, pp 255-266
Abstract

Two studies were performed to investigate the efficacy of doramectin in the prevention of infection with Ostertagia ostertagi and Cooperia oncophora in grazing calves. In each study 24 parasite-naive calves were randomly allotted to 2 equal groups and treated with either doramectin at 200 µg/kg or...

Author(s)
Vercruysse, J.; Dorny, P.; Hong, C.; Harris, T. J.; Hammet, N. C.; Smith, D. G.; Weatherley, A. J.
Citation
Veterinary Parasitology, 1993, 49, 1, pp 51-59
Abstract

Antigenic differences between the developmental stages of O. ostertagi were studied by SDS-PAGE and Western blotting. Gel electrophoresis showed a complex protein pattern different for every stage with the O. ostertagi fourth stage larvae (L4) showing an intermediate protein pattern between the...

Author(s)
Hilderson, H.; Graaf, D. C. de; Vercruysse, J.; Berghen, P.
Citation
Research in Veterinary Science, 1993, 55, 2, pp 203-208
Abstract

Ostertagia ostertagi adult worm extracts were analysed by Western blotting using sera from calves experimentally infected with O. ostertagi and Cooperia oncophora. Strong differences in antigen recognition were noticed, even between animals from the same group. Two Ostertagia specific antigens with ...

Author(s)
Graaf, D. C. de; Berghen, P.; Hilderson, H.; Claerebout, E.; Vercruysse, J.
Citation
International Journal for Parasitology, 1994, 24, 5, pp 681-688
Abstract

The problem of anthelmintic resistance has so far received little attention in Belgium mainly because of the relative unimportance of the small ruminant production in this country. However, small surveys in horses and sheep have indicated that benzimidazole resistance is relatively widespread in...

Author(s)
Dorny, P.; Vercruysse, J.
Publisher
Directorate-General Information, Communication, Culture and Audiovisual, European Commission, Brussels, Belgium
Citation
Anthelmintic resistance in nematodes of farm animals. A seminar organised for the European Commission, held in Brussels, Belgium, from 8 to 9 November, 1993., 1994, pp 41-46
Abstract

The inverse relationship between the intensive use of modern anthelmintics and the build up of immunity to gastrointestinal nematodes in cattle is discussed. Manifestations of immunity, humoral reactions, cell-mediated reactions, control, and chemoprophylaxis and immunity are discussed. It is...

Author(s)
Vercruysse, J.; Hilderson, H.; Claerebout, E.
Citation
Parasitology Today, 1994, 10, 4, pp 129-132
Abstract

Two farms had a low prevalence of gastro-intestinal parasites (dominated by Cooperia and Ostertagia), but there was still a difference in faecal egg counts and serum pepsinogen between 23 calves given a fenbendazole bolus at the start of grazing (at 7-8 months of age) and 23 untreated calves.

Author(s)
Berghen, P.; Hilderson, H.; Vercruysse, J.; Claerebout, E.; Dorny, P.
Citation
Veterinary Quarterly, 1994, 16, 3, pp 161-164
Abstract

The effect of an ivermectin sustained-release bolus (I-SRB) on the epidemiology of nematode parasites and on calf productivity was evaluated in a field trial under Northwestern European conditions. 20 parasite-naive female Friesian calves (principals) aged 5-9 months were used together with 6 male...

Author(s)
Claerebout, E.; Hollanders, W.; Cock, H. de; Vercruysse, J.; Hilderson, H.
Citation
Journal of Veterinary Pharmacology and Therapeutics, 1994, 17, 3, pp 232-236

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