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Abstract

The effect of diet on the gastrin response to a trickle infection with O. ostertagi in the calf was investigated in 2 experiments. Peak hormone levels in infected calves fed hay alone were nearly double those found in animals kept on a largely concentrate diet. This was explained by reference to...

Author(s)
Fox, M. T.; Pitt, S. R.; Gerrelli, D.; Jacobs, D. E.
Citation
International Journal for Parasitology, 1988, 18, 4, pp 547-548
Abstract

A small increase in plasma pepsinogen levels of calves was recorded 10-14 days after the beginning of a trickle infection with D. viviparus larvae, which was related to the site of penetration of invading lungworm larvae. An increase in total thyroxine levels later in the study was due, in part at...

Author(s)
Fox, M. T.; Pitt, S. R.; Gerrelli, D.; Jacobs, D. E.; Simmonds, A. D.
Citation
International Journal for Parasitology, 1988, 18, 4, pp 549-551
Abstract

Blood gastrin and pepsinogen responses to a single infection with 100 000 O. ostertagi infective larvae in lactating dairy cows were investigated. None of the 5 infected cows showed signs of clinical ostertagiasis, nor was there any difference in live weight gain, milk yield or faecal egg count...

Author(s)
Pitt, S. R.; Fox, M. T.; Gerrelli, D.; Jacobs, D. E.
Citation
Research in Veterinary Science, 1988, 45, 1, pp 130-131
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

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

Metabolic effects of a trickle challenge with the equivalent of 10 000 infective O. ostertagi larvae per day were investigated in 12 calves allocated to infected, pair-fed control or ad libitum-fed control groups. Changes in hormone levels reflecting abomasal, pituitary and pancreatic function were ...

Author(s)
Fox, M. T.; Gerrelli, D.; Pitt, S. R.; Jacobs, D. E.; Gill, M.; Simmonds, A. D.
Citation
Research in Veterinary Science, 1989, 47, 3, pp 299-304
Abstract

Non-esterified fatty acid (NEFA) levels in housed, 3-month-old calves were monitored in 2 experiments designed to establish (i) the effect of diet and time of sampling in relation to feeding on blood levels; and (ii) the relationship between appetite and plasma NEFA in animals on chopped hay. In...

Author(s)
Fox, M. T.; Gerrelli, D.; Pitt, S. R.; Jacobs, D. E.
Citation
Veterinary Research Communications, 1991, 15, 2, pp 127-133
Abstract

Eight controlled trials were conducted, using 96 cattle of European breeds, to evaluate the efficacy of abamectin against natural and artificially acquired infections by adult and fourth-stage larvae of all the economically important gastrointestinal nematodes and lungworms in Germany and the UK....

Author(s)
Heinze-Mutz, E. M.; Pitt, S. R.; Bairden, K.; Baggott, D. G.; Armour, J.; Barth, D.; Cramer, L. G.
Citation
Veterinary Record, 1993, 132, 2, pp 35-37
Abstract

Two trials were conducted at separate sites in Europe in order to assess the ability of an ivermectin sustained-release (SR) intraruminal bolus (designed to deliver 8 mg ivermectin/day) to control established infections of gastrointestinal nematodes and the lungworm Dictyocaulus viviparus. In each...

Author(s)
Pitt, S. R.; Heinze-Mutz, E. M.; Baggot, D. G.; Barth, D.
Citation
Helminthologia, 1996, 33, 3, pp 125-131
Abstract

Three trials using 50 European breed cattle were conducted to evaluate the therapeutic and prophylactic efficacy of a sustained-release bolus designed to release 12 mg of ivermectin per day for 135 days (the Ivomec SR Bolus) against nematodes (2 trials) and P. ovis (1 trial) in 16- to 19-month-old ...

Author(s)
Rehbein, S.; Pitt, S. R.; Langholff, W. K.; Barth, D.; Eagleson, J. S.
Citation
Parasitology Research, 1997, 83, 7, pp 722-726

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