[The effect of vitamin A on the resistance of chickens to pasteurellosis].
D000818:Animals; D002645:Chickens; D010326:Pasteurella Infections / Q000517:prevention & control / Q000662:veterinary*; D011201:Poultry Diseases / Q000517:prevention & control; D014801:Vitamin A / Q000627:therapeutic use*
D014801:Vitamin A
Vliianie vitamina A na rezistentnost' kur k pasterellezu.