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VetMed Resource

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

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Abstract

The correspondents comment on the paper by D. A. Wassall on the use of an ELISA for the serodiagnosis of Dictyocaulus viviparus bronchitis in cattle (Veterinary Record (1991) 129 (16) 353-355). There is a reply by Wassall.

Author(s)
Duncan, J. L.; Gilleard, J. S.; McKeand, J. B.
Citation
Veterinary Record, 1992, 130, 2, pp 39
Abstract

Somatic extracts and excretory/secretory (ES) products of the adult stage of Dictyocaulus viviparus were examined for acetylcholinesterase (AChE) activity. Both were found to contain activity which had an optimum pH of 9.5, however, the adult ES products contained over 200 times more AChE activity...

Author(s)
McKeand, J. B.; Knox, D. P.; Duncan, J. L.; Kennedy, M. W.
Citation
International Journal for Parasitology, 1994, 24, 4, pp 501-510
Abstract

Outbred Dunkin-Hartley and inbred strain 2 and strain 13 guineapigs were immunized with Dictyocaulus viviparus adult ES products prior to challenge with 3rd-stage larvae. Antibody responses of the 3 strains to adult ES products and the acetylcholinesterase (AChE) isoforms which they contain were...

Author(s)
McKeand, J. B.; Knox, D. P.; Duncan, J. L.; Kennedy, M. W.
Citation
Parasite Immunology, 1994, 16, 5, pp 251-260
Abstract

Parasite preparations were examined for their ability to induce protective immunity against Dictyocaulus viviparus in guineapigs. Dunkin-Hartley strain guineapigs were immunized with somatic extracts of adult parasites, somatic extracts of third stage larvae or excretory/secretory (ES) products...

Author(s)
McKeand, J. B.; Knox, D. P.; Duncan, J. L.; Kennedy, M. W.
Citation
International Journal for Parasitology, 1995, 25, 1, pp 95-104
Abstract

The adult ES products of Dictyocaulus viviparus are a source of protective antigens against challenge in the guineapig laboratory model. High levels of acetylcholinesterase (AChE) activity are present in these products and these enzymes are immunogenic in infected cattle. The potential role of...

Author(s)
McKeand, J. B.; Knox, D. P.; Duncan, J. L.; Kennedy, M. W.
Citation
International Journal for Parasitology, 1995, 25, 7, pp 829-837
Abstract

Antibody responses to the surface-exposed antigens of living Dictyocaulus viviparus larvae and adult worms were measured by quantitative immunofluorescence using sera from calves infected with, or vaccinated against, the parasite. In infected animals, the sheath surface of third-stage (L3), which...

Author(s)
McKeand, J. B.; Duncan, J. L.; Urquhart, G. M.; Kennedy, M. W.
Citation
Veterinary Parasitology, 1996, 61, 3/4, pp 287-295