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Abstract

The effect of climatic factors on the development and migration of C. oncophora and O. ostertagi L3 in cattle faeces placed on pasture between June and the end of September, and on the dynamics of contamination of pasture grazed by calves was studied in 1987 in Baunschweig-Völkenrode, northern...

Author(s)
Hertzberg, H.
Publisher
Tierärztliche Hochschule Hannover, German Federal Republic
Citation
Wettereinflüsse auf Entwicklung und Verbreitung dritter Larven von Ostertagia ostertagi und Cooperia oncophora und ihre Bedeutung für die Epizootiologie der Trichostrongylidose erstsömmriger Weiderinder., 1988, pp 130 pp.
Abstract

Twenty 3-month-old calves were infected with 100 000 Ostertagia ostertagi on day 0, and then with the equivalent of 10 000/day, given 3 times a week. The calves were treated with fenbendazole (Panacur) before infection and 4-5 months after the start of the experiment. Increased pepsinogen levels...

Author(s)
Fox, M. T.; Pitt, S. R.; Gerrelli, D.; Jacobs, D. G.
Publisher
Elsevier Applied Science Publishers Ltd., Barking, Essex, UK
Citation
Immunoassays for veterinary and food analysis - 1., 1988, pp 293-297
Abstract

This report summarizes the results of 4 trials which compare the performance of feedlot steers treated with either fenbendazole (5 mg/kg bwt) plus a coumaphos dip, or trichlorfon pour on, or ivermectin. The trials were conducted in commercial or research feedlots in Colorado, Texas, Arizona and...

Author(s)
Myers, G. H.; Grant, R. J.
Citation
Agri-Practice, 1988, 9, 5, pp 39-42
Abstract

The effect of infection with trichostrongylids on metabolic rate and protein gain in calves was studied in 2 experiments. In the 1st, 8 male Friesian calves 3 to 6 months old were normal or infected with 20  infective larvae of Cooperia spp. and 7 weeks later with 350 000 of the larvae. During 10...

Author(s)
Verstegen, M. W. A.; Hel, W. van der; Albers, G. A. A.; Kloosterman, A.
Citation
Journal of Animal Physiology and Animal Nutrition, 1988, 60, 4, pp 209-218
Abstract

Ostertagia ostertagi infection in cattle is reviewed under the headings of: life cycle; epidemiology; clinical disease; pathology; pathophysiology; diagnosis; treatment and control.

Author(s)
Myers, G. H.; Taylor, R. F.
Citation
Journal of Veterinary Diagnostic Investigation, 1989, 1, 2, pp 195-200
Abstract

Friesian calves given a low level infection of O. ostertagi over a 6 week period displayed a mild diarrhoea with high faecal egg counts and elevated plasma pepsinogen values. At necropsy on day 23 abomasal lesions characteristic of ostertagiasis were widespread. At 42 and 84 days pi oedema and...

Author(s)
Taylor, L. M.; Parkins, J. J.; Armour, J.; Holmes, P. H.; Bairden, K.; Ibarra-Silva, A. M.; Salman, S. K.; McWilliam, P. N.
Citation
Research in Veterinary Science, 1989, 46, 2, pp 218-225
Abstract

Serum pepsinogen levels were measured in twelve 10-month-old calves experimentally infected with 0, 25 000 or 50 000 Ostertagia ostertagi 3rd-stage larvae (L3). Faecal and blood samples were collected on days 0 and 21 pi. Serum pepsinogen levels were significantly elevated in groups infected with...

Author(s)
Mostofa, M.
Citation
Bangladesh Veterinarian, 1989, 6, 2, pp 52-53
Abstract

Laboratory studies were conducted to determine the effects of horn fly, Haematobia irritans, and housefly, Musca domestica, larvae on the development of a mixed population of parasitic nematodes (Cooperia, Oesophagostomum, Trichostrongylus, Ostertagia and/or Haemonchus) in compressed and crumbled...

Author(s)
Devaney, J. A.; Miller, D. K.; Craig, T. M.
Citation
Journal of Economic Entomology, 1990, 83, 4, pp 1446-1448
Abstract

This article considers factors that affect the epidemiology of parasitism by trichostrongylid nematodes (of the genera Ostertagia, Trichostrongylus, Haemonchus, Cooperia and Nematodirus) in dairy cattle and cites examples of economically beneficial control practices. There are section on the basic...

Author(s)
Reinemeyer, C. R.
Citation
Compendium on Continuing Education for the Practicing Veterinarian, 1990, 12, 5, pp 761-766
Abstract

In an experiment between 1 August and 2 October 1989, 27 Black Pied Danish heifer calves, aged 9-12 months, that had grazed since May on permanent pasture with moderate herbage infectivity were moved to another infected permanent pasture. They were divided into 3 groups of 9 animals and given...

Author(s)
Steffan, P.; Nansen, P.
Citation
Acta Veterinaria Scandinavica, 1990, 31, 2, pp 237-242

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