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VetMed Resource

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

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Abstract

Optimal conditions for cryopreservation of nematode larvae were established using Nematospiroides dubius. Infections by oral challenge with Ostertagia ostertagi, Haemonchus contortus and O. circumcincta, and by laparotomy with Trichostrongylus colubriformis, Cooperia oncophora and Nematodirus...

Author(s)
Coles, G. C.; Simpkin, K. G.; Briscoe, M. G.
Citation
Research in Veterinary Science, 1980, 28, 3, pp 391-392
Abstract

Five novel benzimidazoles in micronised form were tested for anthelmintic activity in naturally or experimentally infected sheep or calves. 2 of the compounds containing selenium showed good activity against inhibited Ostertagia ostertagi and one of these gave almost complete control of adult...

Author(s)
Coles, G. C.; Briscoe, M. G.; Simpkin, K. G.; Oakley, G. A.; McEwan, A. D.
Citation
Research in Veterinary Science, 1981, 31, 2, pp 257-258
Abstract

The importance of drug-resistant nematodes in the USA is briefly discussed and strategies for avoiding the development of resistance (reduced use of anthelmintics, use of full dose, change in anthelmintic type used, avoidance of prolonged drug encounter) are considered.

Author(s)
Coles, G. C.
Citation
Journal of the American Veterinary Medical Association, 1988, 192, 3, pp 330-334
Abstract

Benzimidazole- and levamisole-resistant Ostertagia circumcincta from sheep have been reported from several countries, but there are no reports of anthelmintic-resistant O. ostertagi in cattle, although resistance has been confirmed in controlled trials. Reasons for this may include the biology of...

Author(s)
Coles, G. C.
Citation
Veterinary Parasitology, 1988, 27, 1, pp 89-96
Abstract

Author(s)
Coles, G. C.
Citation
Parasitology Today, 1988, 4, 4, pp 106
Abstract

Incorrect or frequent use of anthelmintics is likely to select for anthelmintic resistant nematodes. In the UK resistance has been recorded with benzimidazoles and nematodes of horses and sheep. However in the southern hemisphere resistance has occurred widely to levamisole and the benzimidazoles,...

Author(s)
Coles, G. C.; Taylor, M. A.
Citation
State Veterinary Journal, 1990, 44, 124, pp 40-53
Abstract

Two tests to detect anthelmintic resistance in strongylid nematodes of ruminants, horses and pigs are described. They are an in vivo test, the faecal egg count reduction test recommended for use in infected animals, and an in vitro test, the egg hatch test recommended for detection of benzimidazole ...

Author(s)
Coles, G. C.; Bauer, C.; Borgsteede, F. H. M.; Geerts, S.; Klei, T. R.; Taylor, M. A.; Waller, P. J.
Citation
Veterinary Parasitology, 1992, 44, 1/2, pp 35-44
Abstract

A review is presented of the reported cases of anthelmintic resistance (AR) in cattle nematodes. Although the number of reports is increasing, AR in cattle remains a sporadic phenomenon, most probably because of the relatively infrequent use of anthelmintics in cattle compared with sheep, goats and ...

Author(s)
Geerts, S.
Publisher
Directorate-General Information, Communication, Culture and Audiovisual, European Commission, Brussels, Belgium
Citation
Anthelmintic resistance in nematodes of farm animals. A seminar organised for the European Commission, held in Brussels, Belgium, from 8 to 9 November, 1993., 1994, pp 25-30
Abstract

The problem of anthelmintic resistance has so far received little attention in Belgium mainly because of the relative unimportance of the small ruminant production in this country. However, small surveys in horses and sheep have indicated that benzimidazole resistance is relatively widespread in...

Author(s)
Dorny, P.; Vercruysse, J.
Publisher
Directorate-General Information, Communication, Culture and Audiovisual, European Commission, Brussels, Belgium
Citation
Anthelmintic resistance in nematodes of farm animals. A seminar organised for the European Commission, held in Brussels, Belgium, from 8 to 9 November, 1993., 1994, pp 41-46
Abstract

As a result of a recent European Union meeting on anthelmintic resistant nematodes of farm animals, a list was made of 9 proposals for research and 5 to control anthelmintic resistance. The most important were the need to have standardized and new tests to monitor the development and spread of...

Author(s)
Coles, G. C.; Borgsteede, F. H. M.; Geerts, S.
Citation
Veterinary Record, 1994, 134, 9, pp 205-206

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