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VetMed Resource

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Abstract

An epidemiological study on gastrointestinal parasites of beef cattle in Uruguay was carried out over a period of 2 years. Thirty-nine chemical tracers (cows treated with oxfendazole at 10 mg/kg 30 days before grazing) and 8 'permanent tracers' (untreated) were necropsied. The most important...

Author(s)
Berdie, J.; Genovese, J.; Zunini, C.; Molinari, C.; Charlone, A.; Castro, E.; Duncan, J. L.
Publisher
IAEA, Vienna, Austria
Citation
Nuclear techniques in the study and control of parasitic diseases of livestock., 1988, pp 91-105
Abstract

To investigate the pathophysiology of H. placei infection in Friesian calves, 7 calves were divided into 2 groups, 3 uninfected calves (control group) and 4 infected calves. The latter calves were infected orally with 500 H. placei larvae/kg bwt. Five weeks after infection they were all housed in...

Author(s)
Gennari, S. M.; Vieira Bressan, M. C. R.; Rogero, J. R.; MacLean, J. M.; Duncan, J. L.
Citation
Veterinary Parasitology, 1991, 38, 2-3, pp 163-172
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

The degree of nematode infectivity of a previously contaminated pasture (grazed by cattle and calves) in Rio Grande do Sul State, Brazil, which was reseeded after harvesting of a soya bean crop was determined by use of 4 tracer lambs and 4 tracer calves. The 8 tracers were put to graze for 14 days...

Author(s)
Echevarria, F. A. M.; Armour, J.; Duncan, J. L.; Pinheiro, A. C.
Citation
Veterinary Parasitology, 1993, 50, 1/2, pp 151-155
Abstract

Worm-free lambs (n = 6) were infected with 5 000 L3 of an ivermectin/benzimidazole/closantel resistant strain of H. contortus. On day 21 post infection animals were allocated according to worm egg counts, to 2 groups of 3 animals each and on day 29 one group was treated with albendazole at 3.8...

Author(s)
Echevarria, F. A. M.; Armour, J.; Bairden, K.; Duncan, J. L.
Citation
Journal of the South African Veterinary Association, 1993, 64, 1, pp 31-34
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

The first edition of the W.A.A.V.P. anthelmintic guidelines for ruminants was published in 1982. Since then improved parasitological procedures have been developed, new therapeutic and prophylactic products have appeared requiring different test methods, and registration authorities are requesting...

Author(s)
Wood, I. B.; Amaral, N. K.; Bairden, K.; Duncan, J. L.; Kassai, T.; Malone, J. B., Jr.; Pankavich, J. A.; Reinecke, R. K.; Slocombe, O.; Taylor, S. M.; Vercruysse, J.
Citation
Veterinary Parasitology, 1995, 58, 3, pp 181-213

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