cell smears of chicken-embryo-fibroblast ( cef ) cultures and bursa of fabricius from chickens experimentally infected with six different strains of infectious bursal disease virus ( ibdv ) were examined for the presence of ibdv by the avidin-biotin-peroxidase complex method of immunoperoxidase ( ip ) staining using a monoclonal antibody specific for ibdv designated bk70 .
C0007634
cell
C0016030
fibroblast