TRIM25 and lymphoma: To detect the relationship between TRIM25 and IBDV infection and the possible antiviral role of TRIM25, we infected DF-1 (immortal chicken embryo fibroblast) cells with the IBDV Gt strain at a multiplicity of infection (MOI) of 0.1 and DT40 (a chicken lymphoma cell line) cells at an MOI of 5.