Abstract

An experiment was conducted to evaluate the effects of herbal extract mixture (HEM, Astragalus membranaceus and Codonopsis pilosula) supplementation on growth performance, nutrient digestibility, and FMD antibody titers in growing-finishing pigs. A total of 120 FMD type O vaccinated growing pigs [(Yorkshire × Landrace) × Duroc] with an average initial BW of 25.19 ± 1.80 kg were randomly allotted into 3 treatments with 8 replicate of 5 pigs per pen for a 16-week feeding study. All pigs were vaccinated against FMD. Treatments consisted of CON, Corn-soybean meal based diet; TRT1, CON + 0.05% HEM; TRT2, CON + 0.1% HEM. Vaccinated pigs fed 0.1% HEM showed higher (P < 0.05) BW and ADG at week 12, 16, and overall period. The supplementation of HEM had no effect on DM, N or GE throughout the experiment (P > 0.05). Feeding 0.1% HEM showed higher FMD type O antibody titers (P < 0.05) at week 14 compared with non-supplemented group. These results indicated that 0.1% HEM supplementation conferred anti-viral effect against FMD, thereby improving ADG in the growing-finishing pigs. Herbal extract mixture could potentially be used as an anti-viral agent against FMDV.

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