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VetMed Resource

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

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Abstract

The general scope of activities of the Bureau is reviewed. The staff numbered 4, 416 regular civil service employees and of these 2, 141 were in the professional and scientific service, about 93% being veterinarians. Expenditure amounted to over £4, 000, 000. During the year 480 students graduated...

Author(s)
Mohler, J. R.
Publisher
Washington, D.C: United States Department of Agriculture,
Citation
Report of the Chief of the Bureau of Animal Industry, 1940., 1940, pp 90 pp.
Abstract

Possible immunomodulation by low-level infection with O. ostertagi was studied in 4-month-old calves. Six groups of 4 calves were treated in the following way: group 1-nonparasitized controls; group 2-nonparasitized, but challenge exposed at day 64 with Brucella abortus strain 19 vaccine (BA) and...

Author(s)
Wiggin, C. J.; Gibbs, H. C.
Citation
American Journal of Veterinary Research, 1989, 50, 10, pp 1764-1770
Abstract

Analysis of a detergent-solubilized somatic antigen of O. ostertagi 3rd stage larvae by SDS-PAGE and Western blotting has revealed two specific antigens with apparent molecular weights of 17 and 43 kD under reducing conditions. Probing of the O. ostertagi preparation with preinfection control sera...

Author(s)
Mansour, M. M.; Dixon, J. B.; Clarkson, M. J.; Carter, S. D.; Rowan, T. G.; Hammat, N. C.
Citation
Veterinary Immunology and Immunopathology, 1990, 24, 4, pp 361-371
Abstract

The possible development of type-1 hypersensitivity reactions in the abomasal mucosa caused by soluble L3 products of O. ostertagi was studied in 4-month-old calves sensitized by repeated exposure to L3 over a 50-day period followed by anthelmintic treatment. Four groups each of 4 calves were used. ...

Author(s)
Wiggin, C. J.; Gibbs, H. C.
Citation
American Journal of Veterinary Research, 1990, 51, 5, pp 825-832
Abstract

Two trials involving housed cattle examined the effect of Co depletion and supplementation on immune status as assessed by the neutrophil function test which measures the ability of isolated neutrophils to kill the yeast Candida albicans. A third trial investigated the extent to which Co status...

Author(s)
Paterson, J. E.; MacPherson, A.
Citation
British Veterinary Journal, 1990, 146, 6, pp 519-530
Abstract

IgG1 antibody responses to O. ostertagi 3rd-stage larvae (L3) and the 3rd party antigen, keyhole limpet haemocyanin (KLH), and faecal egg counts were determined in calves infected with a single dose of O. ostertagi and in uninfected, pair-fed calves. The infected and uninfected calves were given...

Author(s)
Mansour, M. M.; Rowan, T. G.; Dixon, J. B.; Carter, S. D.
Citation
Veterinary Parasitology, 1991, 39, 3-4, pp 321-332
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

Four groups each of 6 calves were given one of two diets, and were either infected or not infected with 3000 O. ostertagi L3 on alternate days for 6 weeks. The diets were either high (H) or low (L) in protein/energy and were within the range of normal husbandry practice in the UK. Both IgG1 and IgG...

Author(s)
Mansour, M. M.; Dixon, J. B.; Rowan, T. G.; Carter, S. D.
Citation
Veterinary Immunology and Immunopathology, 1992, 33, 3, pp 261-269
Abstract

The experiment reported comprised 3 groups of calves, (+P2), (-P2) and (-P1), which all started their first grazing season as parasite-free calves. The (+P2) and (-P2) groups grazed for 2 seasons. In the first season the (-P2)-group of calves was grazing a pasture with no detectable...

Author(s)
Grønvold, J.; Nasen, P.; Gasbarre, L. C.; Christensen, C. M.; Larsen, M.; Monrad, J.; Midtgaard, N.
Citation
Acta Veterinaria Scandinavica, 1992, 33, 4, pp 305-316
Abstract

The immune responses to bovine ostertagiasis and the role Ostertagia mediators play in these responses through their regulatory effects on host immune cells are described. The current understanding of O. ostertagi antigens is reviewed. A hypothesis is proposed for the mechanisms of acquired...

Author(s)
Klesius, P. H.
Citation
Veterinary Parasitology, 1993, 46, 1-4, pp 63-79

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