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Abstract

The efficacy of an oxfendazole pulse release bolus system for the control of parasitic gastroenteritis and parasitic bronchitis in first-season grazing calves was evaluated in Belgium. Twenty-two calves were allocated in two groups. The calves in one group received a bolus at the time of turn out,...

Author(s)
Vercruysse, J.; Dorny, P.; Berghen, P.; Frankena, K.
Citation
Veterinary Record, 1987, 121, 13, pp 297-300
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

An ELISA was used to detect serum pepsinogen and albumen, gastrin and antibodies against Cooperia, Ostertagia and Dictyocaulus species for diagnosis of parasitism in 7 untreated 5-8 month old calves and 7 calves treated with an oxfendazole pulse-release bolus (OPRB). During the grazing season, no...

Author(s)
Hilderson, H.; Vercruysse, J.; Dorny, P.; Berghen, P.; Kloosterman, A.
Citation
Preventive Veterinary Medicine, 1990, 8, 4, pp 283-290
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

Daily changes in serum gastrin and pepsinogen concentration were studied during 2 types of infection with O. ostertagi in calves. In a first experiment 2 calves were trickle infected (10 times 10 000 L3 Ostertagia) and 2 animals received a single infection of 100 000 L3 Ostertagia. Gastrin and...

Author(s)
Hilderson, H.; Dorny, P.; Berghen, P.; Vercruysse, J.; Fransen, J.; Braem, L.
Citation
Journal of Veterinary Medicine. Series B, 1991, 38, 1, pp 25-32
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

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

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

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

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