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Abstract

Development of immunity to Ostertagia ostertagi and Cooperia oncophora and interactions between both species in primed calves were investigated after homologous, heterologous and concurrent challenge infections. Worm counts, faecal egg output, IgG1 and IgG2 antibodies and the presence of globule...

Author(s)
Hilderson, H.; Vercruysse, J.; Claerebout, E.; Graaf, D. C. de; Fransen, J.; Berghen, P.
Citation
Veterinary Parasitology, 1995, 56, 1/3, pp 107-119
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

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

Thirty parasite-naive Holstein-cross heifers aged 7 to 12 months were allocated into 3 groups and were treated with either an oxfendazole pulse release bolus (Repidose) administered orally at turnout or ivermectin (Ivomec) injected s.c. at 200 µg/kg at 3, 8 and 13 weeks after turnout or untreated...

Author(s)
Hollanders, W.; Berghen, P.; Dorny, P.; Hilderson, H.; Vercruysse, J.; Ryan, W. G.
Citation
Veterinary Record, 1992, 130, 16, pp 355-356
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

Gastrin values were evaluated in 130 parasite-free calves, in 61 first season grazing calves during 6 field trials and in 8 experimentally infected adult immune cows. The gastrin values were linked to pepsinogen levels and daily weight gain. Also the influence of thiabendazole treatment on...

Author(s)
Hilderson, H.; Vercruysse, J.; Berghen, P.; Dorny, P.; McKellar, Q. A.
Citation
Journal of Veterinary Medicine. Series B, 1992, 39, 3, pp 187-192
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

An experiment was conducted in calves to investigate the efficacy of a morantel sustained release trilaminate bolus (MSRT) to control gastrointestinal parasitism and to assess the development of immunity during the use of MSRT. Two groups (M and U) of 4 calves each were infected 3 times a week with ...

Author(s)
Vercruysse, J.; Dorny, P.; Hilderson, H.; Berghen, P.
Citation
Veterinary Parasitology, 1992, 44, 1/2, pp 97-106

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