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VetMed Resource

Veterinary information to support practice, based on evidence and continuing education

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Abstract

It is considered that in endemic situations, clinical signs of parasitic diseases are usually confined to young animals. Pulmonary and gastro-intestinal helminthiases in young ruminants are usually followed by the development of immunity and life-long freedom from diseases. However, the recently...

Author(s)
Urquhart, G. M.
Publisher
Masson, Paris, France
Citation
Annales de Parasitologie Humaine et Comparee, 1990, 65, Supplement I, pp 77-78
Abstract

This letter questions the value of exclusive use of ivermectin in calves. If Dictyocaulus viviparus is not eliminated, a resistant strain may arise. If it is eliminated, a herd will be highly susceptible to reinfection. Vaccination might be preferable.

Author(s)
Bain, R. K.; Urquhart, G. M.
Citation
Veterinary Record, 1986, 118, 3, pp 82
Abstract

Urquhart is critical of Oakley's conclusion [see Hm/A 50, 2881] regarding the supposed benefits from treating bovine parasitic bronchitis with levamisole resulting from its faster action than other anthelmintics. Whether or not benzimidazole anthelmintics are associated with higher mortality than...

Author(s)
Urquhart, G. M.
Citation
Veterinary Record, 108, 6, pp 132
Abstract

A 16-day infection of Dictyocaulus viviparus in 2 groups of calves was treated with levamisole and fenbendazole, respectively. 5 days afterwards the calves were reinfected with 4000 larvae and necropsied 21 days later. Although the lungworm burdens of the 2 groups of calves were reduced by about...

Author(s)
Urquhart, G. M.; Jarrett, W. F. H.; Bairden, K.; Bonazzi, E. F.
Citation
Veterinary Record, 108, 9, pp 180-182