Studies on the epidemiology of Strongylus vulgaris infection of the horse.
D000818:Animals; D004739:England; D006736:Horses; D008638:Mesenteric Arteries / Q000469:parasitology; D012621:Seasons; D013319:Strongyle Infections, Equine / Q000453:epidemiology* / Q000469:parasitology; D013320:Strongyloidea