Control of hypobiotic and benzimidazole-resistant nematodes of sheep.

@article{Herd1984ControlOH,
  title={Control of hypobiotic and benzimidazole-resistant nematodes of sheep.},
  author={Robert Herd and R H Streitel and Kelsey E McClure and Charles F. Parker},
  journal={Journal of the American Veterinary Medical Association},
  year={1984},
  volume={184 6},
  pages={726-30}
}
In studies comprising a total of 117 naturally infected crossbred lambs, it was found that lambs turned out to spring pasture were exposed to immediate infection with overwintered Ostertagia, Nematodirus, and Trichostrongylus spp, but did not acquire Haemonchus contortus infection until July. With all species, there appeared to be only one major disease-producing generation of worms per year; it was responsible for serious worm burdens and clinical disease from July onward. High frequencies of… CONTINUE READING

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