Cell culture and viral isolates
The epithelioma papulosum cyprini (EPC) cells, a cell line originated
from fathead minnow Pimephales promelas, was purchased
from the European Collection of Authenticated Cell Cultures
(ECACC no 93120820). EPC cells were cultured in RPMI Dutchmodified
medium with 20 mM HEPES (Gibco BRL-Invitrogen),
fetal bovine serum 10% (FBS, Linus-Cultek) glutamine 2 mM
(Gibco BRL), sodium pyruvate 1 mM, gentamicin 50 mg/ml (Gibco
BRL), and amphotericin 1.2 mg/ml (Gibco BRL).
Viruses used in this study are infectious pancreatic necrosis virus
(IPNV, Sp s