Free versus microencapsulated organic acids in medicated or not medicated diet for piglets.

Piva, A., Grilli, E., Fabbri, L., Pizzamiglio, V., Campani, I.

(2006) Proceeding from the 10th International Symposium on Digestive Physiology in Pigs; p. 29. Vejle, Denmark, 25-27 May

Aim of the study was to investigate hte growth performance of weaned piglets fed either a medicated or not medicated diet supplemented with formic64%+lactic36% (FL) acid (11 kg/ton) or a microencapsulated blend of organic acids and flavors (T) (1 kg/ton, Tetracid®S, EU patent 1391155B1, Vetagro srl, Italy). 480 three-weeks old SCAAPAG x Goland piglets were fed four diets (4 pens of 30 piglets per diet): FL or T with or without medication (M) comprising colistin 180 ppm + amoxicillin 600 ppm for the 1st phase and chlortetracycline 1000 ppm + sulphadiazine 1250 ppm + trimetoprim 250 ppm for the 2nd phase. The piglets received a two-phase diet (I:18% CP, 1.3% Lys, 7.5% EE and 2600 kcal/kg NE; II: 18% CP, 1.2% Lys, 5.6% EE and 2400 kcal/kg NE). All data were analysed by ANOVA. After 42 days, animals fed the medicated diets had higher feed intake (+14% group FL+M vs group FL-M and +13% group T+M vs group T-M; P<0.05) and lower mortality (0.3% vs 2.2%). Final weigths were: 25.6±2.1 kg, 26.4±0.6 kg, 21.1±1.5 kg, 22±2 kg for FL+M, T+M, FL+-M, and T-M, respectively (P<0.05). feed efficiency was not staistically different. The medication plan adopted resulted in maintaining animals in good health status. The microencapsualted acids and flavor blend at 1 kg/ton had similar performances to 11 kg/ton of formic and lactic acids.