R. salmoninarum infection suppressed the levels of receptor-type tyrosine-protein phosphatase kappa-like (ptprk), t-cell receptor alpha (tcra) and il13ra1b in both L-BKD and H-BKD groups, although there was an infection level-dependent suppression for il13ra1b, with the maximum down-regulation in the H-BKD group (Figures 8I–K). Here, PTPRK is linked to infection.