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VetMed Resource

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Abstract

Dictyocaulus viviparus were harvested from calves treated daily with albendazole at dose-rates sub-lethal to this parasite and from matched untreated calves. Male and female reproductive tracts from the worms were examined by light and transmission electron microscopy. A first description of the...

Author(s)
Osman, A. M. M.; Jacobs, D. E.; Plummer, J. M.
Citation
Journal of Helminthology, 1994, 68, 2, pp 161-166
Abstract

The author discusses the possibility that early season prophylaxis using anthelmintics for the control of parasitic gastroenteritis in calves may interfere with the acquisition of immunity to lungworm. He suggests that field reports should be followed up further before conclusions can be drawn...

Author(s)
Jacobs, D. E.
Citation
Veterinary Record, 1993, 133, 23, pp 579
Abstract

The effects of a trickle challenge with the equivalent of 10 000 infective O. ostertagi larvae per day on appetite, digestibility, rate of passage of digesta and liveweight gain were investigated in 12 calves assigned to infected, pair-fed control and ad libitum-fed control groups. Digestibility of ...

Author(s)
Fox, M. T.; Gerrelli, D.; Pitt, S. R.; Jacobs, D. E.; Gill, M.; Gale, D. L.
Citation
Research in Veterinary Science, 1989, 47, 3, pp 294-298
Abstract

Lungworm-infected seeder calves were used on four 1.41 ha paddocks to ensure that groups of 11 calves would be exposed to a heavy challenge with Dictyocaulus viviparus. By the 39th day after turn-out there was a serious episode of respiratory disease, and a diagnosis of parasitic bronchitis was...

Author(s)
Jacobs, D. E.; Pilkington, J. G.; Fox, M. T.
Citation
Veterinary Record, 1988, 123, 16, pp 411-413
Abstract

In separate experiments, the immune status of six matched pairs of yearling heifers from a field in which both parasitic gastroenteritis and husk had occurred in control animals, was tested with a single massive challenge of either Dictyocaulus viviparus or Ostertagia ostertagi. The clinical...

Author(s)
Jacobs, D. E.; Pitt, S. R.; Foster, J.; Fox, M. T.
Citation
Research in Veterinary Science, 1987, 43, 2, pp 273-275
Abstract

In three trials in 120 autumn-born calves in southern England during the 1985 grazing season, the oxfendazole bolus controlled gastrointestinal helminths and improved weight gains, giving results comparable to or better than those of a morantel bolus, or two doses of fenbendazole 3 and 6 weeks...

Author(s)
Jacobs, D. E.; Fox, M. T.; Gowling, G.; Foster, J.; Pitt, S. R.; Gerrelli, D.
Citation
Journal of Veterinary Pharmacology and Therapeutics, 1987, 10, 1, pp 30-36
Abstract

The device releases 750 mg oxfendazole on five occasions three weeks apart, thus destroying invading lungworms before maturity and preventing accummulation of larvae on pasture yet allowing some migration within the host to induce immunity. Two treated calves were fenced apart from 2 controls, then ...

Author(s)
Jacobs, D. E.; Gowling, G.; Foster, J.; Fox, M. T.; Oakley, G. A.
Citation
Journal of Veterinary Pharmacology and Therapeutics, 1986, 9, 3, pp 337-340
Abstract

Adult lungworms present in calves around the sixth week after turnout play an important role in determining the subsequent pattern of disease. A trial was designed to test whether prophylactic treatment at this time would control disease in calves under British conditions. Thirty autumn-born...

Author(s)
Jacobs, D. E.; Fox, M. T.; Koyo, F. A.
Citation
Veterinary Record, 1985, 116, 18, pp 492-496
Abstract

In a 2-year trial involving successive batches of 36 autumn-born steers on two adjacent sites, calves treated with ivermectin at three and eight weeks after turn out contaminated pastures much less than untreated control animals. Each year dry summers prevented the larval challenge on the control...

Author(s)
Jacobs, D. E.; Fox, M. T.; Ryan, W. G.
Citation
Veterinary Record, 1987, 120, 2, pp 29-31
Abstract

Twenty-four first-season calves were randomly allocated to 3 similar groups: non-treated controls; vaccinated against Dictyocaulus viviparus; treated with ivermectin 21, 56 and 91 days after turnout and set-stocked on separate pastures. Parasitic bronchitis became evident in the controls and signs...

Author(s)
Jacobs, D. E.; Foster, J.; Gowling, G.; Pilkington, J. G.; Fox, M. T.; Ryan, W. G.
Citation
Veterinary Parasitology, 1989, 34, 1-2, pp 45-56

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