IFNB1 and infection: Compared with infected cells treated with the siRNA Control (siControl), IEC4.1 cells transfected with siPOOLs to CSpV1-dsRNAs following infection showed a decreased level of CSpV1-RdRp level (Fig. 4f) with a similar infection burden (Fig. 4g) but a significant inhibition on C. parvum-induced Ifnb1 expression (Fig. 4h).