MUC2 and infection: Notably, BV-DFM supplementation, especially in presence of CP challenge, upregulated the expression of sIgA and MUC2 which are not only central to mucosal defence and microbial regulation in the GIT but also an indicator of an enhanced immune readiness of the gut to combat with an impending infection (Macpherson et al., 2008; Kim and Ho, 2010).