The influence of vitamin A on disease states.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000150:complications; D002645:Chickens; D003048:Coccidiosis / Q000150:complications / Q000662:veterinary; D006373:Helminthiasis / Q000150:complications; D006374:Helminthiasis, Animal; D011201:Poultry Diseases / Q000150:complications; D012756:Sheep; D012757:Sheep Diseases / Q000150:complications; D014777:Virus Diseases / Q000150:complications / Q000662:veterinary; D014801:Vitamin A / Q000378:metabolism / Q000502:physiology / Q000627:therapeutic use; D014802:Vitamin A Deficiency / Q000150:complications / Q000662:veterinary
D014801:Vitamin A