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Abstract

Analysis of 85 studies on gastrointestinal nematode infections in first-grazing season (FGS) calves is presented. The studies cover a 26-year period and were carried out in 13 countries in Western Europe. Both control and chemoprophylactic-treated (early in the season) FGS calf groups were...

Author(s)
Shaw, D. J.; Vercruysse, J.; Claerebout, E.; Dorny, P.
Citation
Veterinary Parasitology, 1998, 75, 2/3, pp 133-151
Abstract

A study was carried out to evaluate the effect of different infection levels of Ostertagia ostertagi and Cooperia oncophora in a simulated 'first grazing season' on the resistance of calves to an artificial challenge infection. The infection levels were determined by the infection schedules and the ...

Author(s)
Claerebout, E.; Vercruysse, J.; Dorny, P.; Demeulenaere, D.; Dereu, A.
Citation
Veterinary Parasitology, 1998, 75, 2/3, pp 153-167
Abstract

A study was conducted in 1994-95 on a commercial dairy cattle farm in Belgium, to evaluate the efficacy of 2 topical treatments with doramectin on the season-long control of lungworm and gastrointestinal infections in first grazing season (FGS) calves. At the start of the study, 20 FGS calves were...

Author(s)
Vercruysse, J.; Dorny, P.; Claerebout, E.; Weatherley, A.
Citation
Veterinary Parasitology, 1998, 75, 2/3, pp 169-179
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

Two studies were conducted in France in 1996 to investigate the efficacy of a single application of doramectin pour-on (500 µg/kg) at turn-out (in April) in controlling gastro-intestinal Trichostrongylidae (Ostertagia and Cooperia spp.) in second-season cattle. One study involved 30 Limousin...

Author(s)
Gosselin, J.; Dorchies, P.; Mage, C.; Vercruysse, J.
Citation
Revue de Médecine Vétérinaire, 1998, 149, 4, pp 331-338
Abstract

The importance of L3, L4 and adult stages of Mecistocirrus digitatus in inducing resistance to reinfection was examined in 3 groups of 5 calves (A, B, C) which were immunized for 2 consecutive days with a daily dose of 20 000 M. digitatus infective larvae. Group A was treated with ivermectin at 7...

Author(s)
Aken, D. van; Vercruysse, J.; Dargantes, A.; Valdez, L.; Flores, A.; Shaw, D. J.
Citation
Parasitology, 1998, 117, 1, pp 83-87
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

This article poses, and discusses, the following questions: based on the distribution of cattle worldwide, what are the target parasites; can we continue to rely on control based mainly on the use of (highly effective) anthelmintics; what are the prospects for non-chemical control; who will develop ...

Author(s)
Vercruysse, J.; Dorny, P.
Citation
International Journal for Parasitology, 1999, 29, 1, pp 165-175
Abstract

In a study carried out in Belgium, 2 groups of second grazing season cattle, which had been treated with an ivermectin-sustained-release bolus (ISRB) in their first grazing season, were monitored during consecutive years (1995 and 1996) on the same second grazing season pasture. In the preceding...

Author(s)
Claerebout, E.; Dorny, P.; Agneessens, J.; Demeulenaere, D.; Vercruysse, J.
Citation
Veterinary Parasitology, 1999, 80, 4, pp 289-301

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