Observations on the epidemiology of parasitic gastro-enteritis in calves.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology*; D004463:Ecology; D005243:Feces; D005759:Gastroenteritis / Q000453:epidemiology / Q000662:veterinary*; D008297:Male; D009348:Nematoda / Q000254:growth & development; D009349:Nematode Infections / Q000453:epidemiology* / Q000662:veterinary*; D006109:Poaceae; D012621:Seasons; D014251:Trichostrongyloidea / Q000254:growth & development; D014252:Trichostrongyloidiasis / Q000453:epidemiology / Q000662:veterinary*