Some observations on the free-living stages of Ostertagia ostertagi, a stomach worm of cattle.
D000818:Animals; D002417:Cattle / Q000469:parasitology; D006373:Helminthiasis; D006376:Helminths; D010028:Ostertagia; D013270:Stomach; D014251:Trichostrongyloidea
CATTLE/parasitology; TRICHOSTRONGYLOIDEA