title: [The effect of preventive administration of vitamin A and E to piglets fed a complete mixture].
abstract: Four trials were conducted with 258 sucking and weaned piglets to examine the need of additional vitamin A and E supplements and the applicability of such supplements as intramuscular injection. The neonatal administration of retinol-acetate alone or in mixture with testosterone-propionate exerted no influence on the growth of piglets. The levels of vitamin A in blood plasma and in liver were just slightly higher than in the control sibs at the moment of early weaning and three weeks afterwards. The intramuscular administration of retinol-acetate and tocopherol-acetate to piglets at early weaning had no positive effect on the growth and health conditions of the animals. With a decreased intake of feed mixture after weaning, the mentioned treatment did not provide the usual increase in circulating vitamin A; it increased its content in liver but failed to prevent considerable reduction of tocopherolaemia. As indicated by an evaluation performed two days after administration, the peroral intake of vitamins A and E showed higher effects on vitamin A and E levels in blood plasma and on vitamin A level in liver, as compared with the intramuscular administration of the same dose. The preventive injection of vitamins A and E to piglets did not increase the economic profits when the sows and piglets were fed with the current complete mixtures. The discussion deals with the problems of supplying vitamin E to weaned piglets.
mesh_terms: D000821:Animal Feed; D000818:Animals; D001835:Body Weight / Q000187:drug effects*; D013552:Swine; D013553:Swine Diseases / Q000517:prevention & control*; D014801:Vitamin A / Q000008:administration & dosage*; D014810:Vitamin E / Q000008:administration & dosage*
chemical_list: D014801:Vitamin A; D014810:Vitamin E
vernacular_title: Ucinek preventivního podání vitamínů A a E selatům pri krmení kompletními smĕsmi.