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Abstract

Resistance to modern anthelmintics by ruminant nematode parasites is an increasing problem throughout the world. To date the problem has largely been reported in parasites of small ruminants, but there are increasing reports of such resistance in nematodes recovered from cattle. Until now there...

Author(s)
Gasbarre, L. C.; Smith, L. L.; Lichtenfels, J. R.; Pilitt, P. A.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Veterinary Parasitology, 2009, 166, 3/4, pp 281-285
Abstract

The duration of the anthelmintic activity of abamectin administered by sc injection at 200 µg/kg was determined using induced infections of Haemonchus placei, Ostertagia ostertagi, Cooperia spp., and Oesophagostomum radiatum in cattle. 24 Friesian calves, raised under worm-free conditions, were...

Author(s)
Eagleson, J. S.; Scott, P. G.; Gross, S. J.
Citation
New Zealand Veterinary Journal, 1992, 40, 1, pp 21-23
Abstract

Three groups of 11 naturally infected crossbred beef calves were injected subcutaneously with moxidectin 1% injectable at 0.2 or 0.3 mg moxidectin/kg bodyweight or with the unmedicated vehicle. Nematode infections had been acquired during grazing from December to April. Based on the faecal egg...

Author(s)
Williams, J. C.; Barras, S. A.; Wang, G. T.
Citation
Veterinary Record, 1992, 131, 15, pp 345-347
Abstract

Fifty-five cattle (6 months of age, weighing 104 to 263 kg) with known faecal egg counts were treated with oxfendazole at a dose of 4.5 mg/kg bwt, orally, intraruminally or with top-dress pellets mixed in the food. In all the groups reductions in the percentage of larvating ova were observed by 8...

Author(s)
Bradley, R. E.
Citation
Agri-Practice, 1989, 10, 3, pp 5-7
Abstract

The efficacy of ivermectin administered at 200 µg/kg was evaluated against induced infestations of 5 gastrointestinal nematode species in cattle. Results were analysed by the modified non-parametric method and an "A" class (more than 80% effective in more than 80% of the treated animals) was...

Author(s)
Swan, G. E.; Schröder, J.; Louw, J. P.
Citation
Journal of the South African Veterinary Association, 1985, 56, 1, pp 21-23
Abstract

Three groups of 30 crossbred beef steers, 8-10 months of age and ranging in weight from 158 to 320 kg, were used to compare effects of treatment with an ivermectin sustained-release bolus or 2 ivermectin injectable treatments on parasite control and productivity in relation to untreated controls...

Author(s)
Williams, J. C.; Loyacano, A. F.; Broussard, S. D.; Coombs, D. F.
Citation
Veterinary Parasitology, 1995, 58, 1/2, pp 75-82
Abstract

An experiment was conducted to compare the anthelmintic efficacy of albendazole (ABZ), levamisole (LEV) and fenbendazole (FBZ) against inhibited early 4th-stage larvae (EL4) of Ostertagia ostertagi during April in Louisiana, USA. Forty cross-bred beef heifers (average weight 165 kg) were acquired...

Author(s)
Williams, J. C.
Citation
Veterinary Parasitology, 1991, 40, 1-2, pp 59-71
Abstract

Three worm-free calves aged 6 to 7 months were injected subcutaneously with ivermectin at 200 µg/kg and 7 days later they were infected orally with a mixture of infective larvae (5000 Haemonchus placei, 20 000 Cooperia pectinata, 3000 Oesophagostomum radiatum). Larvae from the same source were also ...

Author(s)
Bremner, K. C.; Berrie, D. A.; Hotson, I. K.
Citation
Veterinary Record, 1983, 113, 24, pp 569
Abstract

The anthelmintic efficacy of ivermectin (IVM) delivered from a sustained-release (SR) bolus was evaluated against natural infections with gastrointestinal tract nematodes in 12 crossbred beef heifers in spring in Louisiana, USA. The 12 calves were randomly allotted to 2 groups of 6 calves each....

Author(s)
Williams, J. C.; Plue, R. E.
Citation
American Journal of Veterinary Research, 1992, 53, 5, pp 793-795
Abstract

On Jos Plateau, Nigeria, in March-April 1979 (late dry season) 40 zebu cattle were divided into 2 groups and treated with thiophanate at 50 mg/kg body-weight or left untreated. Faecal egg counts on 4 treated animals showed that eggs were absent one week after treatment and averaged <50 epg after 6 weeks. Autopsy of 3 treated animals after 4 or 5 days showed that, apart from some inhibited 4th-stage larvae and a few developing worms, all nematodes had been removed. Egg counts on untreated controls one to 6 weeks after treatment ranged from 6000 to 8000 epg (Haemonchus) and 6500 to 9500 epg (Cooperia). Autopsy of 2 animals not included in the experiment but from the same source revealed H. placei, C. pectinata and C. punctata.

Author(s)
Fabiyi, J. P.; Oluyede, D. A.; Negedu, J. O.
Citation
Veterinary Record, 1979, 105, 16, pp 375

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