Interaction between Oesophagostomum columbianum and Oesophagostomum venulosum in sheep.
D000818:Animals; D004463:Ecology; D005260:Female; D009814:Oesophagostomiasis / Q000469:parasitology / Q000662:veterinary*; D009815:Oesophagostomum / Q000502:physiology*; D012756:Sheep; D012757:Sheep Diseases / Q000469:parasitology*