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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

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

In an experiment conducted in South East Zealand, Denmark, in the 1991 grazing season, the size and composition of O. ostertagi worm burdens was investigated in tracer calves grazed in early autumn. Two groups of first season cross breed Limousin × Red Danish heifer calves (groups T1 and T2) were...

Author(s)
Satrija, F.; Nansen, P.
Citation
Bulletin of the Scandinavian Society for Parasitology, 1993, 3, 1, pp 20-22
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
Abstract

Matched groups of 8 first-season heifer calves aged between 6 and 8 months were turned out in early May 1992 on a permanent pasture contaminated with trichostrongyles. Groups were grazed separately until they were housed in mid October 1992. Group A remained as untreated controls, group B received...

Author(s)
Satrija, F.; Nansen, P.; Midtgaard, N.; Yang, X.
Citation
Acta Veterinaria Scandinavica, 1995, 36, 3, pp 383-386

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