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Abstract

Two studies were performed to investigate the efficacy of doramectin in the prevention of infection with Ostertagia ostertagi and Cooperia oncophora in grazing calves. In each study 24 parasite-naive calves were randomly allotted to 2 equal groups and treated with either doramectin at 200 µg/kg or...

Author(s)
Vercruysse, J.; Dorny, P.; Hong, C.; Harris, T. J.; Hammet, N. C.; Smith, D. G.; Weatherley, A. J.
Citation
Veterinary Parasitology, 1993, 49, 1, pp 51-59
Abstract

The efficacy of two strategic treatments with doramectin (sc 200 µg/kg bodyweight) was studied in 20 first-season Holstein crossbred calves. The calves were allocated to two equal groups: Group D was treated with doramectin at turn-out and 8 weeks later and Group C served as control group. Tracers...

Author(s)
Vercruysse, J.; Hilderson, H.; Claerebout, E.; Roelants, B.
Citation
Veterinary Parasitology, 1995, 58, 1/2, pp 27-34
Abstract

The influence of prophylaxis on the immune response to gastrointestinal nematodes was evaluated in 3 groups of 10 first-season grazing calves. Group C functioned as untreated controls, whereas Group L received 2 treatments, one at turn-out and one 8 weeks later, with doramectin (200 µg/kg) and...

Author(s)
Vercruysse, J.; Hilderson, H.; Claerebout, E.
Citation
Veterinary Parasitology, 1995, 58, 1/2, pp 35-48
Abstract

A single treatment with doramectin (200 mg/kg s.c.) given at turnout was compared with a proven programme of 2 pour-on treatments with ivermectin (500 mg/kg) given at turnout and 6 weeks later in groups of 15 Holstein cross Friesian calves (10-12 months old). For a short grazing season of 126 days, ...

Author(s)
Vercruysse, J.; Claerebout, E.; Dereu, A.; Lonneux, J. F.
Citation
Veterinary Record, 1996, 139, 22, pp 547-548
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

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

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

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

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