Efficacy of Feed Additives Against Swine Viruses in Feed

Summary Research has demonstrated that swine viruses can be transmitted via feed. Therefore, strategies are needed to prevent or mitigate swine viruses in feed. The use of chemical feed additives is a strategy that has been shown to have potential utility for this purpose. Therefore, the objective of this study was to evaluate the efficacy of a commercially available formaldehyde-based feed additive, medium chain fatty acid blend (MCFA), and commercially available fatty acid-based products for mitigation of porcine epidemic diarrhea virus (PEDV) and porcine reproductive and respiratory syndrome virus (PRRSV) as viral mitigants in a feed matrix. Experimental treatments consisted of: 1) non-treated, individually inoculated virus controls (positive control); 2) 0.33% commercial formaldehyde-based product (Sal Curb; Kemin Industries, Inc.; Des Moines, IA); 3) 0.50% MCFA blend (1:1:1 ratio of C6:0, C8:0, and C10:0, Sigma Aldrich, St. Louis, MO); 4) 0.25%; 5) 0.50%; or 6) 1.00% of commercial dry mono and diglyceride-based product (Furst Strike; Furst-McNess Company, Freeport, IL); 7) 0.25%; 8) 0.50%; or 9) 1.00% of commercial dry mono and diglyceride-based product (Furst Protect; Furst-McNess Company, Freeport, IL); 10) 0.25%; 11) 0.50%; or 12) 1.00% dry mono and diglyceride-based