[Preparation and identification of the monoclonal antibody specific to hemagglutinin of avian paramyxovirus type 2].

A hybridoma cell line 1G4A7 secreting monoclonal antibody (McAb) specific to hemagglutinin of avian paramyxovirus type 2 (APMV-2) was developed by fusing the spleen cells of APMV-2 immunized BAlb/c mice with SP2/0 myeloma cells. The immunoglobulin subclass of 1G4A7 was IgG1 with light chain kappa and the affinity constant against APMV-2 was 1.02 X 10(10). Identified by HI and indirect ELISA, the McAb titers in ascities were 10 log 2 and 1 : 10(6) respectively. The McAb did not cross react with the common avian viruses, showing good specificity. There existed obvious differences in antigenitic relationship among APMV-2 viruses analyzed by HI and indirect ELISA using McAb 1G4A7.