HAMP and infection: Although the hepc gene is expressed in both salmonid skin tissues, whether C. rogercresseyi infection has occurred or not, it appears to decrease, along with cath1, in Coho salmon skin at 14 dpi, compared with 7 dpi with C. rogercresseyi [74], whereas the expression of cath2, nkl, defb3, and defb4 appears to increase 14 dpi in Coho salmon skin [74].