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VetMed Resource

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Abstract

Fluctuations in the contamination of herbage with trichostrongylid larvae are determined by a number of factors, the most important being climate and management. Practical measures to prevent calves from ingesting large numbers of larvae are based on detailed knowledge of the herbage contamination...

Author(s)
Nansen, P.; Joergensen, R. J.; Hansen, J. W.; Sejrsen, K.
Citation
Veterinary Science Communications, 1978, 2, 3, pp 193-205
Abstract

On alpine pastures (2000 to 2400 m) in south-eastern Switzerland (Kanton Graubunden) grazed by cattle until the end of September, Ostertagia, Cooperia and Nematodirus larvae could still be found in the faecal pats when sampled the following June. In calves the numbers of gastro-intestinal nematode...

Author(s)
Eckert, J.; Perl, R.; Inderbitzin, F.
Publisher
Martinus Nijhoff for the Commission of the European Communities., The Hague, Netherlands
Citation
Epidemiology and control of nematodiasis in cattle. An animal pathology Workshop in the CEC Programme of Coordination of Agricultural Research, Royal Veterinary and Agricultural University, Copenhagen, Denmark, 4-6 February 1980. (Current Topics in Veterinary Medicine and Animal Science Vol.9.), 1981, pp 177-187
Abstract

An experiment was designed to examine whether P. pulmonarius could destroy the preparasitic stages of Ostertagia ostertagi and Cooperia oncophora. Larvae of the trichostrongyles were obtained by culturing faeces collected from experimentally infected calves. Batches of preinfective (1st and 2nd...

Author(s)
Larsen, M.; Nansen, P.
Citation
Acta Veterinaria Scandinavica, 1990, 31, 4, pp 509-510
Abstract

In an experiment between 1 August and 2 October 1989, 27 Black Pied Danish heifer calves, aged 9-12 months, that had grazed since May on permanent pasture with moderate herbage infectivity were moved to another infected permanent pasture. They were divided into 3 groups of 9 animals and given...

Author(s)
Steffan, P.; Nansen, P.
Citation
Acta Veterinaria Scandinavica, 1990, 31, 2, pp 237-242
Abstract

An experiment was carried out to study the role of the ruminal function in the establishment of Ostertagia ostertagi in newborn calves. Three groups of calves were fed either milk only (groups A and C), or hay and concentrate in addition to milk (group B) from birth. At the time of infection,...

Author(s)
Satrija, F.; Nansen, P.; Christensen, C. M.
Citation
Research in Veterinary Science, 1991, 51, 3, pp 344-346
Abstract

An experiment was designed to test the survival and performance of stress selected nematophagous fungi after passage through the gastro-intestinal tract of Danish cattle. Ruminating calves were fed daily with a fixed amount of fungal material grown on barley grains. The excreted dung was collected...

Author(s)
Larsen, M.; Wolstrup, J.; Henriksen, S. A.; Grønvold, J.; Nansen, P.
Citation
Journal of Helminthology, 1992, 66, 2, pp 137-141
Abstract

Immunity to O. ostertagi infections in calves develops slowly and only becomes manifest towards the end of a grazing season in which they have been exposed to the parasite. In an attempt to hasten the onset of immune reactions, 3 immunization protocols were set up. 24 heifers were allocated into 4...

Author(s)
Christensen, C. M.; Nansen, P.; Henriksen, S. A.; Monrad, J.; Satrija, F.
Citation
Veterinary Parasitology, 1992, 44, 3/4, pp 247-261
Abstract

This review primarily discusses the status and prospects for control of bovine ostertagiasis in northern Europe, with examples from Denmark, under the headings: prospects for control of ostertagiasis in relation to farming intensity and specialisation; immunity and control (naturally acquired...

Author(s)
Nansen, P.
Citation
Veterinary Parasitology, 1993, 46, 1-4, pp 3-21
Abstract

Serum anti-Ostertagia ostertagi and anti-Cooperia oncophora antibody responses were assessed in first season and second season calves grazing permanent paddocks. Calves without previous exposure to trichostrongyles were found to mount significant parasite-specific IgG1 antibody responses within two ...

Author(s)
Gasbarre, L. C.; Nansen, P.; Monrad, J.; Gronveld, J.; Steffan, P.; Henriksen, S. A.
Citation
Research in Veterinary Science, 1993, 54, 3, pp 340-344
Abstract

The effects of experimental concurrent infection with O. ostertagi and C. oncophora were compared with the effects of monospecific infections with O. ostertagi under conditions designed to mimic natural conditions on pasture during a grazing season. A significant effect of C. oncophora on the...

Author(s)
Satrija, F.; Nansen, P.
Citation
Research in Veterinary Science, 1993, 55, 1, pp 92-97

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