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VetMed Resource

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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

From a thoroughly mixed portion of cattle faeces with Cooperia sp. eggs, 1-kg artificial pats were placed in 6 buckets containing 6 kg of soil each. Ten dung beetles, D. quinquedens, were added to each of 3 buckets. The remaining 3 buckets served as controls without beetles. When infective parasite ...

Author(s)
Grønvold, J.; Sommer, C.; Holter, P.; Nansen, P.
Citation
Journal of Parasitology, 1992, 78, 5, pp 845-848
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

An experiment was carried out to study the effect of concurrent infection with Ostertagia ostertagi and Cooperia oncophora compared with mono-specific infections with either O. ostertagi or C. oncophora.The effects of different infection levels on the course of concurrent infections were also...

Author(s)
Satrija, F.; Nansen, P.
Citation
Bulletin of the Scandinavian Society for Parasitology, 1992, 2, 1, pp 42
Abstract

In a study during 1991, lucerne pellets were offered ad libitum to grazing heifers in an automated self-feeder from July 31 when their average body-weight had reached 270 kg. The supplementary feeding was timed to coincide with the uptake of a new generation of infective trichostrongyle larvae and...

Author(s)
Jørgensen, R. J.; Satrija, F.; Monrad, J.; Nansen, P.
Citation
Veterinary Record, 1992, 131, 6, pp 126-127
Abstract

The effect of different larval dose levels and dosing regimens on the course of Cooperia oncophora infection in calves was studied in 4 groups, each of 4 calves experimentally infected either with 50 000 or 200 000 C. oncophora larvae (L3) given either as single infections or as daily trickle...

Author(s)
Satrija, F.; Nansen, P.
Citation
Acta Veterinaria Scandinavica, 1992, 33, 3, pp 229-236
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

The use of nematode-trapping fungi to control nematode parasites of cattle is discussed. Investigations with Arthrobotrys oligospora are described. Field trials in which fungi (A. oligospora and Duddingtonia flagrans isolates) were fed to calves are reported: D. flagrans showed a marked effect...

Author(s)
Grønvold, J.; Wolstrup, J.; Nansen, P.; Henriksen, S. A.
Citation
Parasitology Today, 1993, 9, 4, pp 137-140
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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