Porcine deltacoronavirus (PDCoV) is a newly emerged porcine enteropathogenic coronavirus, identified in 2014 (Marthaler et al., 2014b; Wang et al., 2014) . Recombinant full-length PDCoV N (Su et al., 2015) or the S1 region of S protein- (Thachil et al., 2015) based ELISA assays have been developed and showed no crossreactivity with PEDV antisera.