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Abstract

The influence of different types of chemoprophylaxis on the resistance of first season grazing calves against natural reinfection with Ostertagia ostertagi and Cooperia oncophora in the second grazing season was investigated. A total of 30 helminth-naive crossbred calves were randomly divided into...

Author(s)
Claerebout, E.; Dorny, P.; Vercruysse, J.; Agneessens, J.; Demeulenaere, D.
Citation
Veterinary Parasitology, 1998, 76, 4, pp 287-303
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

Two group of calves, 36 Holstein cross-bred bull and 36 heifer calves (aged 6-8 months) were each divided into 6 groups of 6, in Belgium [date not given]. In both main groups, calves in the first control group (C1) and first treated group (T1) received a daily infection of 200 L3 of O. ostertagi...

Author(s)
Vercruysse, J.; Claerebout, E.; Dorny, P.; Demeulenaere, D.; Agneessens, J.; Smets, K.
Citation
Veterinary Record, 1998, 143, 16, pp 443-446
Abstract

Larval migration inhibition (LMI) activity of abomasal mucus from calves naturally infected with gastrointestinal nematodes was studied in vitro. LMI activity was also assessed in serum from calves during both natural and artificial O. ostertagi infections to monitor the development of acquired...

Author(s)
Claerebout, E.; Agneessens, J.; Shaw, D. J.; Vercruysse, J.
Citation
Research in Veterinary Science, 1999, 66, 3, pp 253-257
Abstract

The persistent efficacies of doramectin and ivermectin injectable against moderate and high infection levels of Ostertagia ostertagi and Cooperia oncophora were evaluated in cattle. Calves were allocated to 6 groups of 6 animals. On Day 0 animals of Groups I1/I2 and D1/D2 were treated with 0.2...

Author(s)
Vercruysse, J.; Dorny, P.; Claerebout, E.; Demeulenaere, D.; Smets, K.; Agneessens, J.
Citation
Veterinary Parasitology, 2000, 89, 1/2, pp 63-69
Abstract

This review discusses the immune responses to gastrointestinal nematodes in cattle and the different immunological and parasitological parameters used to assess acquired immunity. Measuring acquired immunity to gastrointestinal nematodes in cattle (e.g. for the evaluation of candidate parasite...

Author(s)
Claerebout, E.; Vercruysse, J.
Citation
Parasitology, 2000, 120, supplement, pp S25-S42
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

The contribution of different bovine cell subpopulations in the development of in vitro induced responses by O. ostertagi third larval antigen extract (L3) was investigated in bovine abomasal lymph node cell suspensions depleted of specific cell populations. The depleted cell suspensions were...

Author(s)
Marez, T. de; Cox, E.; Vercruysse, J.; Goddeeris, B. M.
Citation
Veterinary Immunology and Immunopathology, 2000, 73, 2, pp 145-154
Abstract

Five groups of 7 Holstein cross bull calves were used to compare the persistent efficacy of doramectin and eprinomectin pour-on formulations against C. oncophora and O. ostertagi. Calves were given either doramectin or eprinomectin at 500 µg/kg body weight on day 0 (groups 1 and 2) or day 7 of the...

Author(s)
Dorny, P.; Demeulenaere, D.; Smets, K.; Claerebout, E.; Vercruysse, J.
Citation
Veterinary Record, 2000, 147, 5, pp 139-140
Abstract

Host tissue penetration, feeding and immune evasion by helminth parasites may be mediated by both mechanical processes and histolytic products released by the parasite. To investigate potential histolytic products released during in vitro maintenance of exsheathed 3rd (L3) and 4th (L4) stage larvae ...

Author(s)
Geldhof, P.; Claerebout, E.; Knox, D. P.; Agneessens, J.; Vercruysse, J.
Publisher
Cambridge University Press, Cambridge, UK
Citation
Parasitology, 2000, 121, 6, pp 639-647

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