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Abstract

This review briefly summarises different aspects (including development and measurement) and manifestations of protective immunity in cattle against gastrointestinal nematodes, especially Ostertagia ostertagi, and the factors that may interact with the development of this immunity. There follows a...

Author(s)
Vercruysse, J.; Claerebout, E.
Citation
Veterinary Parasitology, 1997, 72, 3/4, pp 309-326
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

The development of immunity to Ostertagia ostertagi and Cooperia oncophora and interactions between these species were investigated in experimentally infected calves. Parasitological, serological and histological parameters were used for assessing immune responses. No conclusive evidence of an...

Author(s)
Dorny, P.; Claerebout, E.; Vercruysse, J.; Hilderson, H.; Huntley, J. F.
Citation
Veterinary Parasitology, 1997, 70, 1/3, pp 143-151
Abstract

Four groups (A-D) of first season grazing calves were turned out onto a heavily infested pasture (Ostertagia ostertagi) for 5 months, and a 5th group (E) was kept as uninfected controls. At housing all group A calves were killed for worm counts. A mean total of 78 915 Ostertagia worms were found,...

Author(s)
Claerebout, E.; Hilderson, H.; Shaw, D. J.; Vercruysse, J.
Citation
Veterinary Parasitology, 1997, 68, 4, pp 337-346
Abstract

The persistent efficacy of 4 commercially available macrocyclic lactones (ML) in maintaining reduced faecal egg counts in cattle grazing naturally infested pastures was evaluated in 44 zebu animals aged 1-2 years in Zambia. The study started in February (rainy season) when the strongyle egg output...

Author(s)
Meeus, P. F. M.; Bont, J. de; Vercruysse, J.
Citation
Veterinary Parasitology, 1997, 70, 4, pp 219-224
Abstract

The persistence of the efficacy of moxidectin 0.5% pour-on and moxidectin 1% injectable against O. ostertagi and D. viviparus in calves was studied in 2 experimental trials. In the first trial 2 groups of 7 calves were treated with either the pour-on or the injectable formulation, while a third...

Author(s)
Vercruysse, J.; Claerebout, E.; Dorny, P.; Demeulenaere, D.; Deroover, E.
Citation
Veterinary Record, 1997, 140, 3, pp 64-66
Abstract

The responses of peripheral blood and lymph node lymphocytes to O. ostertagi antigen extracts were determined in O. ostertagi-exposed and naive calves. The lymphocyte responses induced by O. ostertagi antigen extracts of the third (L3) and fourth (L4) larval stages, as well as adult worms, were...

Author(s)
Marez, T. de; Cox, E.; Claerebout, E.; Vercruysse, J.; Goddeeris, B. M.
Citation
Veterinary Immunology and Immunopathology, 1997, 57, 1/2, pp 69-77
Abstract

Chemoprophylaxis with an ivermectin sustained-release bolus in the first grazing season on the resistance of cattle to gastrointestinal nematodes during the following grazing season was investigated. In 1993 and 1994 dairy replacement calves were either given one bolus at the start of their first...

Author(s)
Claerebout, E.; Hollanders, W.; Dorny, P.; Vercruysse, J.
Citation
Veterinary Record, 1997, 141, 17, pp 441-445
Abstract

Between February 1994 and March 1995, faecal and serum samples were collected monthly from Zebu cattle of 1 to 30 months old on 3 ranches (20-25 animals ranch-1 sample-1) in Mindanao, Philippines. On 2 of the ranches one ivermectin treatment was carried out during the experimental period....

Author(s)
Aken, D. van; Vercruysse, J.; Dargantes, A.; Lagapa, J.; Shaw, D. J.
Citation
Veterinary Parasitology, 1998, 74, 1, pp 29-41
Abstract

The results from analysis of 85 studies involving over 2000 first grazing season (FGS) calves put onto pasture for at least 4 months from late spring/early summer over a 26-year period in 13 countries in Western Europe are presented. Both control and chemoprophylactic treated FGS calf groups were...

Author(s)
Shaw, D. J.; Vercruysse, J.; Claerebout, E.; Dorny, P.
Citation
Veterinary Parasitology, 1998, 75, 2/3, pp 115-131

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