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Abstract

The objective of this study was to determine the prevailing levels of infection with Ostertagia ostertagi in first-season grazing calves and related management factors in three European countries (Belgium, Germany and Sweden). A cross-sectional survey was performed in first-season grazing dairy ...

Author(s)
Charlier, J.; Demeler, J.; Höglund, J.; Samson-Himmelstjerna, G. von; Dorny, P.; Vercruysse, J.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Veterinary Parasitology, 2010, 171, 1/2, pp 91-98
Abstract

A retrospective study was carried out to assess the possibility of using daily weight gain in first-season grazing cattle (FSG) as a marker for treatment decisions to prevent parasite-induced losses caused by gastrointestinal (GI) nematodes. This is intended as a proof of concept for using targeted ...

Author(s)
Höglund, J.; Morrison, D. A.; Charlier, J.; Dimander, S. O.; Larsson, A.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Veterinary Parasitology, 2009, 164, 1, pp 80-88
Abstract

The serum pepsinogen level is widely accepted as a useful parameter for monitoring gastrointestinal nematode infections in first-season grazing calves. However, several aspects, with possible implications for its practicality and the way to use the pepsinogen test, have received little attention to ...

Author(s)
Charlier, J.; Dorny, P.; Levecke, B.; Demeler, J.; Samson-Himmelstjerna, G. von; Höglund, J.; Vercruysse, J.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Research in Veterinary Science, 2011, 90, 3, pp 451-456
Abstract

Three groups of 4 calves were experimentally infected with infectious larvae of Mecistocirrus digitatus. One group received a trickle infection of 5000 L3/day for 8 days; the other 2 groups received a single infection of 5000 and 40 000 L3, respectively. All animals were killed 120 days pi....

Author(s)
Aken, D. van; Vercruysse, J.; Dargantes, A. P.; Lagapa, J. T.; Raes, S.; Shaw, D. J.
Citation
Veterinary Parasitology, 1997, 69, 3/4, pp 255-263
Abstract

Estimation of serum pepsinogen concentration in cattle is used to aid the detection of clinical or subclinical infections with Ostertagia ostertagi. An inexpensive, simple micro method for the routine determination of pepsinogen concentration in bovine serum samples is described which is based on...

Author(s)
Dorny, P.; Vercruysse, J.
Citation
Research in Veterinary Science, 1998, 65, 3, pp 259-262
Abstract

A study was carried out to evaluate the effects of strategic early-season treatments with eprinomectin on first-season grazing calves exposed to strongyle infections on a naturally contaminated pasture. Two groups each of 10 first grazing season calves were turned out in mid-May 1997 on 2 plots in...

Author(s)
Dorny, P.; Demeulenaere, D.; Smets, K.; Vercruysse, J.
Citation
Veterinary Parasitology, 2000, 89, 4, pp 277-286
Abstract

Over a period of 1 year, from November 1997 to October 1998, the abomasa, blood and faecal samples of 121 dairy cows in Belgium were collected and examined for nematode infections. Nematodes were present in the abomasa of 110 animals. Ostertagia ostertagi was found in all 110, Trichostrongylus was...

Author(s)
Agneessens, J.; Claerebout, E.; Dorny, P.; Borgsteede, F. H. M.; Vercruysse, J.
Citation
Veterinary Parasitology, 2000, 90, 1/2, pp 83-92
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

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

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