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VetMed Resource

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

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Abstract

The cannulation was performed in 26 Holstein steers. It was successful in 23 (88.5 %) of the animals. 22 were infected either naturally or experimentally with the abomasal nematode, Ostertagia ostertagi and/or other gastrointestinal parasites. Lymph was collected for immunological and biochemical...

Author(s)
Baker, D. G.; Gershwin, L. J.; Snider, T. G.
Citation
American Journal of Veterinary Research, 1991, 52, 7, pp 1117-1120
Abstract

Serum samples, collected monthly from January through December 1988 from 10 cows, their calves, and 10 yearling heifers, were used to determine total and Ostertagia-specific IgE levels. In addition, serum pepsinogen concentrations, faecal egg counts, and body weights were measured. The following...

Author(s)
Baker, D. G.; Gershwin, L. J.
Citation
Veterinary Parasitology, 1992, 44, 3/4, pp 211-221
Abstract

A series of experiments was performed to determine whether immunoglobulin E (IgE) and Type I hypersensitivity reactions might be involved in the immune response of cattle to infection with Ostertagia ostertagi. The following observations were made. When calves were lightly infected, serum IgE...

Author(s)
Baker, D. G.; Gershwin, L. J.
Citation
Veterinary Parasitology, 1993, 46, 1-4, pp 93-102
Abstract

Changes in serum total and Ostertagia-specific IgE levels, and pepsinogen concentrations were evaluated in 28 Holstein calves naturally or experimentally infected with O. ostertagi. In addition, IgE and pepsinogen concentrations were determined in abomasal lymph. Results showed that lymph IgE...

Author(s)
Baker, D. G.; Gershwin, L. J.
Citation
Veterinary Parasitology, 1993, 47, 1/2, pp 87-97
Abstract

Abomasal mucosal mast cell and eosinophil accumulation was morphometrically evaluated in 26 Holstein steers after natural or experimental infection with O. ostertagi. Results showed that following infection, accumulation of mast cells and eosinophils in abomasal tissue was dependent on infection...

Author(s)
Baker, D. G.; Gershwin, L. J.; Hyde, D. M.
Citation
International Journal for Parasitology, 1993, 23, 3, pp 327-332
Abstract

Plasma histamine, prostaglandin (PG) D2, PGE2 and leukotriene (LT) C4 levels were determined in 26 Holstein steers before and after natural or experimental infection with O. ostertagi. Post-infection abomasal lymph was also assayed for PGD2, PGE2, and LTC4. Histamine determinations were performed...

Author(s)
Baker, D. G.; Gershwin, L. J.; Giri, S. N.; Li, C. F.
Citation
International Journal for Parasitology, 1993, 23, 3, pp 333-339
Abstract

Pepsinogen and protein concentrations were determined in blood samples, collected from the left gastroepiploic artery and vein, and in abomasal lymph from 15 steers naturally infected with Ostertagia ostertagi and 4 uninfected steers. In steers with type-1 ostertagiosis, the concn gradient between...

Author(s)
Baker, D. G.; Bruss, M. L.; Gershwin, L. J.
Citation
American Journal of Veterinary Research, 1993, 54, 8, pp 1294-1298