Antigenic characterization
Antigenic analysis of three Egyptian NDVs AR2178-14, R1973-11-cl4 and
R1954-11-cl6 as well as of another five reference strains was performed
by hemagglutination inhibition (HI) assay, as described
(CEC, 1992). In addition to a panel of
four polyclonal sera (see previous section) and five HN-specific
monoclonal antibodies were used (mAb 617/161, mAb U85, mAb 7D4 were a
generous gift from AVLA-Weybridge and mAb 39-2, mAb 10 were a gift from
Bernd Köllner, FLI)