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Abstract

5 chemoprophylactic or chemotherapeutic strategies against bovine ostertagiasis were compared using a mathematical model of the population biology of O. ostertagi. The model offers a means of screening novel strategies prior to their further investigation in the field. Under conditions of climate...

Author(s)
Smith, G.; Grenfell, B. T.; Anderson, R. M.; Beddington, J.
Citation
Parasitology, 1987, 95, 2, pp 407-420
Abstract

In USSR, 24 of 34 heifers all infected with Ostertagia ostertagi and Haemonchus contortus were treated, before being put out to graze, with 20% tetramisole granules with a resulting drop in prevalence to 24%. 10 heifers remained untreated. During the grazing season the prevalence of infection rose...

Author(s)
Golovkina, L. P.
Citation
Byulleten' Vsesoyuznogo Instituta Gel'mintologii im. K.I. Skryabina, 1983, No.35, pp 56-57
Abstract

Fifteen 18-month-old heifers, before being turned on to contaminated pasture, were given a bolus designed to release 0.65-1.11 mg of morantel base per kg body weight daily for up to 90 days. Faecal egg counts remained low throughout the summer, and were on average 70% lower than in a control group...

Author(s)
Gibbs, H. C.; Kitsos, A.
Citation
American Journal of Veterinary Research, 1985, 46, 11, pp 2241-2244
Abstract

The epidemiology and the effect on live weight gain (LWG) of internal parasites was studied on weaned heifers from May to December during 1990 and 1991. In each period 2 groups of 20 calves were chosen at random and grazed the same natural pasture. The stocking rates were 1 head/3.5 ha (1990) and 1 ...

Author(s)
Suárez, V. H.; Busetti, M. R.; Torrado, J. J.; DeCarli, L. R.; Ramos, J.
Citation
Veterinaria Argentina, 1993, 10, 92, pp 86, 88-94
Abstract

In Western Australia 4 groups of 30 cows and calves, including 10 first calvers, were grazed in separate 22 ha paddocks from May 1975 until weaning in October 1975. 4 Wormolas blocks (which contain phenothiazine) were placed in each of 2 paddocks, but consumption was too low for the cattle to take...

Author(s)
Wilkinson, F. C.; Chaneet, G. de
Citation
Journal of Agriculture, Western Australia, 1977, 18, 1, pp 20-21
Abstract

The role of anthelmintic treatments in programmes to control gastro-intestinal nematodes, mainly Ostertagia ostertagi, in cattle in New South Wales, Australia, and the seasonal timing for treatment of beef and dairy calves up to 12 months old in tableland and coastal areas, respectively, are...

Author(s)
Smeal, M. G.
Citation
New South Wales Veterinary Proceedings, 1976, 12, pp 15-17
Abstract

From the end of October 1983 to mid-December 1984, observations were made in western Buenos Aires Province, Argentina, on the epidemiology, effects and control of gastrointestinal parasitism. Two groups of 20 (G I) and 40 (G II) crossbred Zebu yearlings transported from the Chaco were run together...

Author(s)
Suárez, V. H.; Ciminari, O. E.; Bello, E. M.; Busetti, M. R.; Bedotti, O. D.
Citation
Veterinaria Argentina, 1987, 4, 38, pp 695-705
Abstract

The derivation of a method using resident and tracer calves to determine whether or not Ostertagia ostertagi had arrested its development in cattle during the summer is described. Application of this method to the O. ostertagi population in calves in Missouri, USA, during winter 1980-81 showed...

Author(s)
Brauer, M. A.; Corwin, R. M.
Citation
Bovine Practitioner, 1984, No.19, pp 208-212
Abstract

68 worm-free calves were allowed to graze with a naturally infected herd for each of 34 one-month periods from November 1979 to August 1982, then transferred to a cement-floored pen for 3 weeks and then killed. Ostertagia ostertagi and Cooperia onchophora were the most prevalent nematodes...

Author(s)
Padilha-Charles, T. N.
Citation
Dissertation Abstracts International, B, 1986, 47, 4, pp 1446
Abstract

In a study of beef cattle in Limousin, France, suckling calves had an average worm burden of 550 when killed in August, and in those killed at the beginning of October the burden averaged 14 200. The majority were Ostertagia ostertagi and, of these, 49% in August and 83% in October were 4th-stage...

Author(s)
Raynaud, J. P.; Mage, C.; Le Stang, J. P.; Jones, R. M.
Publisher
Martinus Nijhoff for the Commission of the European Communities., The Hague, Netherlands
Citation
Epidemiology and control of nematodiasis in cattle. An animal pathology Workshop in the CEC Programme of Coordination of Agricultural Research, Royal Veterinary and Agricultural University, Copenhagen, Denmark, 4-6 February 1980. (Current Topics in Veterinary Medicine and Animal Science Vol.9.), 1981, pp 193-212

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