Studies on immunity to Haemonchus contortus infection--double vaccination of sheep with irradiated larvae.
D000818:Animals; D006189:Haemonchus; D007239:Infections; D007814:Larva; D012756:Sheep; D012757:Sheep Diseases; D034561:Sheep, Domestic; D014251:Trichostrongyloidea; D014611:Vaccination
SHEEP/diseases; TRICHOSTRONGYLOIDEA/infection