Jump to Main Content
- Peregrine, A.S., et al. Show all 6 Authors
- Veterinary parasitology 2013 v.198 no.1-2 pp. 159-165
- Haemonchus contortus; benzimidazole; drug resistance; eggs; farms; fecal egg count; fenbendazole; flocks; gastrointestinal nematodes; gene frequency; genes; larval development; sequence analysis; sheep; tubulin; Ontario
- ... In 2011, a field study was conducted to assess drug resistance of gastro-intestinal nematodes in sheep flocks in Ontario, Canada. Benzimidazole resistance in Haemonchus contortus was assessed by genetic analysis of eggs; measurement of resistant allele percentages at codons 167, 198 and 200 in the β-tubulin gene was determined on pools of H. contortus eggs using pyrosequencing. Susceptibility to b ...
- Peregrine, A.S., et al. Show all 11 Authors
- Veterinary parasitology 2013 v.193 no.1-3 pp. 150-162
- Haemonchus; confidence interval; eggs; farms; fecal egg count; feces; fenbendazole; flocks; gastrointestinal nematodes; ivermectin; lambs; larval development; levamisole; parasitism; researchers; thiabendazole; Ontario
- ... Gastrointestinal nematodes (GIN) are a significant constraint to pasture-based sheep production worldwide. Anthelmintic resistance (AR) has been reported in most sheep-raising areas in the world, yet little is known about the AR status in Canada. This study was conducted to determine the frequency of AR in GIN in sheep flocks in Ontario, Canada. Forty-seven sheep flocks were enrolled in the study, ...