Eyeworm (Thelazia sp) in cattle.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000469:parasitology*; D005128:Eye Diseases / Q000469:parasitology / Q000662:veterinary*; D005260:Female; D008297:Male; D009349:Nematode Infections / Q000469:parasitology / Q000662:veterinary*; D013151:Spiruroidea; D013802:Thelazioidea