The degree of mucin sulphation and sialylation were assessed during T. muris infection with High-Iron Diamine-Alcian Blue (HID-AB) staining in acute (high dose (HD) infection in BALB/c mice) and chronic (HD and low dose (LD) infection in AKR and BALB/c mice, respectively); worm burdens are shown in S1a Fig. Here, MUC5AC is linked to infection.