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Abstract

The epidemiology of gastrointestinal helminth infections in beef cows and calves on pasture was studied in Belgium during the 1990 and 1992 grazing seasons. Weight gain, faecal egg counts, generic differentiation of infective larvae, serum pepsinogen levels, herbage larval counts and worm burdens...

Author(s)
Agneessens, J.; Dorny, P.; Hollanders, W.; Claerebout, E.; Vercruysse, J.
Citation
Veterinary Parasitology, 1997, 69, 1/2, pp 65-75
Abstract

Comparative analyses of the patterns of gastrointestinal nematode infections of first-grazing season cattle in Belgium are presented. The analysis involved 17 studies covering a 10 year period on 13 different farms in Flanders, Belgium. In all studies the calves were divided into an untreated...

Author(s)
Shaw, D. J.; Vercruysse, J.; Claerebout, E.; Agneessens, J.; Dorny, P.
Citation
Veterinary Parasitology, 1997, 69, 1/2, pp 103-116
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 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

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
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

In 1998 a questionnaire was sent to 2280 dairy cattle farmers in Flanders, Belgium, to investigate whether the pasture management included measures to control gastrointestinal nematodes, whether chemoprophylaxis was applied and whether chemoprophylaxis and grazing management were integrated, rather ...

Author(s)
Claerebout, E.; Agneessens, J.; Demeulenaere, D.; Vercruysse, J.
Citation
Vlaams Diergeneeskundig Tijdschrift, 2000, 69, 2, pp 108-115
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

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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