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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

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

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

The influence of prophylaxis on the immune response to gastrointestinal nematodes was evaluated in 3 groups of 10 first-season grazing calves. Group C functioned as untreated controls, whereas Group L received 2 treatments, one at turn-out and one 8 weeks later, with doramectin (200 µg/kg) and...

Author(s)
Vercruysse, J.; Hilderson, H.; Claerebout, E.
Citation
Veterinary Parasitology, 1995, 58, 1/2, pp 35-48
Abstract

A single treatment with doramectin (200 mg/kg s.c.) given at turnout was compared with a proven programme of 2 pour-on treatments with ivermectin (500 mg/kg) given at turnout and 6 weeks later in groups of 15 Holstein cross Friesian calves (10-12 months old). For a short grazing season of 126 days, ...

Author(s)
Vercruysse, J.; Claerebout, E.; Dereu, A.; Lonneux, J. F.
Citation
Veterinary Record, 1996, 139, 22, pp 547-548
Abstract

Comparative analyses of the patterns of gastrointestinal nematode infections of first-grazing season cattle in Belgium are presented. The analysis involved 17 studies covering a 10 year period on 13 different farms in Flanders, Belgium. In all studies the calves were divided into an untreated...

Author(s)
Shaw, D. J.; Vercruysse, J.; Claerebout, E.; Agneessens, J.; Dorny, P.
Citation
Veterinary Parasitology, 1997, 69, 1/2, pp 103-116
Abstract

Chemoprophylaxis with an ivermectin sustained-release bolus in the first grazing season on the resistance of cattle to gastrointestinal nematodes during the following grazing season was investigated. In 1993 and 1994 dairy replacement calves were either given one bolus at the start of their first...

Author(s)
Claerebout, E.; Hollanders, W.; Dorny, P.; Vercruysse, J.
Citation
Veterinary Record, 1997, 141, 17, pp 441-445
Abstract

The results from analysis of 85 studies involving over 2000 first grazing season (FGS) calves put onto pasture for at least 4 months from late spring/early summer over a 26-year period in 13 countries in Western Europe are presented. Both control and chemoprophylactic treated FGS calf groups were...

Author(s)
Shaw, D. J.; Vercruysse, J.; Claerebout, E.; Dorny, P.
Citation
Veterinary Parasitology, 1998, 75, 2/3, pp 115-131
Abstract

A study was conducted in 1994-95 on a commercial dairy cattle farm in Belgium, to evaluate the efficacy of 2 topical treatments with doramectin on the season-long control of lungworm and gastrointestinal infections in first grazing season (FGS) calves. At the start of the study, 20 FGS calves were...

Author(s)
Vercruysse, J.; Dorny, P.; Claerebout, E.; Weatherley, A.
Citation
Veterinary Parasitology, 1998, 75, 2/3, pp 169-179
Abstract

The influence of different types of chemoprophylaxis on the resistance of first season grazing calves against natural reinfection with Ostertagia ostertagi and Cooperia oncophora in the second grazing season was investigated. A total of 30 helminth-naive crossbred calves were randomly divided into...

Author(s)
Claerebout, E.; Dorny, P.; Vercruysse, J.; Agneessens, J.; Demeulenaere, D.
Citation
Veterinary Parasitology, 1998, 76, 4, pp 287-303

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