Further observations on the free-living stages of Ostertagia ostertagi in cattle.
D000818:Animals; D002417:Cattle / Q000469:parasitology; D041981:Gastrointestinal Tract / Q000469:parasitology*; D009348:Nematoda; D010028:Ostertagia
CATTLE/parasitology; GASTROINTESTINAL SYSTEM/parasitology; NEMATODA