CCL20 and infection: Notably, the abundance of seven chemokines, such as C–C motif chemokine ligand 14 (CCL14), CCL20, CCL25, CCL5, C–X–C motif chemokine ligand 10 (CXCL10), CXCL14, and atypical chemokine receptor 3 (ACKR3), was significantly higher by infection in the R line of the TSF flock (Additional file 3).