title: A natural infection of sheep with Ostertagia ostertagi.
authors.affiliation: Central Veterinary Laboratories, Department of Agriculture, Adelaide, South Australia.
authors.forename: M G
authors.initials: MG
authors.lastname: O'Callaghan
authors.forename: R R
authors.initials: RR
authors.lastname: Martin
authors.forename: I J
authors.initials: IJ
authors.lastname: McFarland
mesh_terms: D000018:Abomasum / Q000469:parasitology / Q000473:pathology; D000818:Animals; D005243:Feces / Q000469:parasitology; D005260:Female; D007411:Intestinal Diseases, Parasitic / Q000469:parasitology / Q000662:veterinary*; D007422:Intestines / Q000469:parasitology; D008297:Male; D010028:Ostertagia / Q000033:anatomy & histology / Q000254:growth & development*; D010029:Ostertagiasis / Q000469:parasitology / Q000662:veterinary*; D010270:Parasite Egg Count / Q000662:veterinary; D012756:Sheep; D012757:Sheep Diseases / Q000469:parasitology*