Evaluation of formaldehyde when complete feed and soybean meal were inoculated with porcine epidemic diarrhea virus, porcine reproductive and respiratory syndrome virus, and Seneca Valley virus 1.

Formaldehyde has been found to decrease virus concentrations in feed and ingredient matrices. Continued research is needed to identify the appropriate inclusion levels and application time for different viruses in these matrices. The objective was to evaluate different inclusion levels of formaldehyde when applied either pre- or postinoculation of porcine epidemic diarrhea virus (), type 2 porcine reproductive and respiratory syndrome virus (), and Seneca Valley virus 1 () to complete feed or soybean meal.