Vitamin A deficiency and Eimeria acervulina infection in the chick.
D000367:Age Factors; D000704:Analysis of Variance; D000821:Animal Feed; D000818:Animals; D001835:Body Weight; D002645:Chickens; D003048:Coccidiosis / Q000150:complications / Q000276:immunology / Q000662:veterinary*; D004539:Eimeria; D011201:Poultry Diseases / Q000276:immunology; D014801:Vitamin A / Q000008:administration & dosage / Q000494:pharmacology; D014802:Vitamin A Deficiency / Q000150:complications / Q000209:etiology / Q000662:veterinary*
D014801:Vitamin A