title: Epidemiological studies on gastro-intestinal nematode parasites of sheep. Infection patterns on clean and autumn-contaminated pasture.
mesh_terms: D000818:Animals; D005243:Feces; D005260:Female; D007411:Intestinal Diseases, Parasitic; D007814:Larva; D008297:Male; D009348:Nematoda / Q000302:isolation & purification; D009349:Nematode Infections / Q000662:veterinary*; D010063:Ovum; D006109:Poaceae; D012621:Seasons; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology*; D013272:Stomach Diseases / Q000662:veterinary*; D014251:Trichostrongyloidea / Q000302:isolation & purification