If you use data provided by the US-SPD, please credit in the following format:
Anderson, T.K., Inderski, B., Diel, D.G. et al. The United States Swine Pathogen Database: integrating veterinary diagnostic laboratory sequence data to monitor emerging pathogens of swine. Database (2021) Vol. 2021: article ID baab078; DOI: https://doi.org/10.1093/database/baab078 (date data retrieved).