Serum Ferritin and Total Iron-Binding Capacity to Estimate Iron Storage in Pigs

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Abstract
The inability to accurately determine storage iron in baby pigs limits the development of new treatment programs. In pigs treated neonatally with iron dextran, serum ferritin had increased dramatically at ten days of age and then returned to near preinjection levels by 50 days of age. In contrast, serum ferritin in untreated pigs declined until they were offered creep feed at 21 days of age. When serum ferritin, serum iron, serum total iron-binding capacity, erythrocyte number, packed cell volume, and blood hemoglobin were measured in three-week-old pigs, serum ferritin combined with serum total iron-binding capacity correlated significantly with the total nonheme iron in the liver and spleen. The nonheme iron (in mg) could be predicted (r2 = 0.71) by the following expression: 8.7 + 0.6 (ferritin in ng/ml).

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