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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

Of 16 naturally infected cattle aged 10-12 months, not previously wormed, 8 were treated with 500 µg/g ivermectin pour-on. Faecal examinations, and PM examinations on days 9-10, revealed 100% efficacy against Haemonchus placei, Oesophagostomum radiatum, O. venulosum and Dictyocaulus viviparus, over ...

Author(s)
Steffan, P. E.; Castro, T. E.
Citation
Veterinaria Argentina, 1990, 7, 70, pp 668,670-674
Abstract

Twelve calves (mean weight, 175.5 kg) were used to confirm efficacy of ivermectin delivered from a prototype sustained-release bolus against naturally acquired (gas-inhibited) larvae of Ostertagia ostertagi. The calves were allocated by restricted randomization on weight to 1 of 2 groups: controls, ...

Author(s)
Zimmerman, G. L.; Mulrooney, D. M.; Wallace, D. H.
Citation
American Journal of Veterinary Research, 1991, 52, 1, pp 62-63
Abstract

The efficacy of 0.5% moxidectin pour-on at 2 dosages was evaluated in 30 cattle with naturally acquired gastrointestinal nematode infections. The cattle were ranked according to pretreatment faecal egg counts and body weights, and were randomly assigned from replicates to 3 treatment groups. The...

Author(s)
Morin, D.; Valdez, R.; Lichtensteiger, C.; Paul, A.; DiPietro, J.; Guerino, F.
Citation
Veterinary Parasitology, 1996, 65, 1/2, pp 75-81
Abstract

The anthelmintic effectiveness of moxidectin, administered topically at the rate of 500 µg/kg bwt, was determined for lactating dairy cows in Arkansas, USA. Naturally infected animals were given either topical vehicle or moxidectin (Cydectin Pour-On) at the rate of 1 ml/10 kg bwt (10...

Author(s)
Yazwinski, T. A.; Tucker, C.; Copeland, S.; Yazwinski, T.; Guerino, F.
Citation
Veterinary Parasitology, 1999, 86, 4, pp 223-228
Abstract

Twenty crossbred beef heifer calves were used for an efficacy evaluation of 0.5% moxidectin pour-on against gastrointestinal nematodes and Dictyocaulus viviparus. The latter parasite and Bunostomum phlebotomum were the target species. The calves were exposed to natural infection on pasture from...

Author(s)
Williams, J. C.; Broussard, S. D.; Wang, G. T.
Citation
Veterinary Parasitology, 1996, 64, 4, pp 277-283
Abstract

The therapeutic efficacy of doramectin administered subcutaneously at a dose rate of 200 µg/kg (1 ml/50 kg) was assessed in cattle harbouring natural mixed field infections of gastrointestinal and pulmonary nematodes in Minas Gerais, Brazil. Twenty male 10- to 15-month-old Zebu × Holstein calves...

Author(s)
Lima, J. D.; Muniz, R. A.; Lima, W. dos S.; Gonçalves, L. C. B.; Silva, A. C. da; Guimarães, A. M.
Citation
Revista Brasileira de Parasitologia Veterinária, 1995, 4, 1, pp 49-52
Abstract

Ivermectin dosages which permitted ≤ 1% of infected control calf worm populations to establish ranged from < 2.5 µg/kg/day, which totally prevented infection with Dictyocaulus viviparus and Oesophagostomum radiatum, to ∼ 30 µg/kg/day required to suppress Nematodirus helvetianus to the same...

Author(s)
Egerton, J. R.; Suhayda, D.; Eary, C. H.
Citation
Veterinary Parasitology, 1986, 22, 1/2, pp 67-75
Abstract

Anthelmintic efficacy of ivermectin against Mecistocirrus digitatus was evaluated in 10 naturally infected zebu calves. Group 1 (n = 5) was not treated, and group 2 (n = 5) was treated s/c with 200 µg of ivermectin/kg of body weight. Calves were killed 14 or 15 days after treatment. There was 100%...

Author(s)
Mendoza-de Gives, P.; Fuentes, R. N.; Herrera-Rodríguez, D.; Roncalli, R. A.
Citation
American Journal of Veterinary Research, 1987, 48, 11, pp 1611-1612
Abstract

Author(s)
Courtney, C. H.; Greiner, E. C.; Whitten, R. D.
Citation
American Journal of Veterinary Research, 1986, 47, 1, pp 119-122

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