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Abstract

The course of serum pepsinogen concentration was studied in 6 calves infected experimentally with Ostertagia, and in 43 calves on 4 premises, exposed to infested pasture. Serum pepsinogen was also measured in 44 cows, 15 of which had positive faecal egg counts for Ostertagia. It was confirmed that...

Author(s)
Berghen, P.; Dorny, P.; Vercruysse, J.; Hilderson, H. M.
Citation
Vlaams Diergeneeskundig Tijdschrift, 1988, 57, 3, pp 157-173
Abstract

Two outbreaks of parasitic gastroenteritis were observed in a group of 10 first-season grazing calves, one in mid-July and one in mid-September. In both cases emergency anthelmintic treatment was needed to prevent further damage. Severe clinical signs were observed together with high faecal egg...

Author(s)
Berghen, P.; Dorny, P.; Hilderson, H.; Vercruysse, J.; Hollanders, W.
Citation
Veterinary Record, 1990, 127, 17, pp 426-430
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
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

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
Abstract

The efficacy of two strategic treatments with doramectin (sc 200 µg/kg bodyweight) was studied in 20 first-season Holstein crossbred calves. The calves were allocated to two equal groups: Group D was treated with doramectin at turn-out and 8 weeks later and Group C served as control group. Tracers...

Author(s)
Vercruysse, J.; Hilderson, H.; Claerebout, E.; Roelants, B.
Citation
Veterinary Parasitology, 1995, 58, 1/2, pp 27-34
Abstract

The relative contribution of the 3rd (L3), 4th (L4) and adult stages of O. ostertagi to the development of immunity was assessed in calves which were either continuously infected during 21 weeks or subjected to infections truncated by anthelmintic treatment at the L3 or L4 stage. A 4th group...

Author(s)
Claerebout, E.; Hilderson, H.; Meeus, P.; Marez, T. de; Behnke, J.; Huntley, J.; Vercruysse, J.
Citation
Veterinary Parasitology, 1996, 66, 3/4, pp 225-239
Abstract

The epidemiology of gastrointestinal helminth infections in beef cows and calves on pasture was studied in Belgium during the 1990 and 1992 grazing seasons. Weight gain, faecal egg counts, generic differentiation of infective larvae, serum pepsinogen levels, herbage larval counts and worm burdens...

Author(s)
Agneessens, J.; Dorny, P.; Hollanders, W.; Claerebout, E.; Vercruysse, J.
Citation
Veterinary Parasitology, 1997, 69, 1/2, pp 65-75
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

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