CCL4 and infection: This is an expected reaction upon infection and responses with several of these chemokines and cytokines have also been monitored upon Eimeria infection in chickens, e.g. CCL4, IL-8, IL-1β and CSF3 (Laurent et al., 2001; Hong et al., 2006a, 2006b; Cornelissen et al., 2009; Zhang et al., 2017).