[Monoclonal antibodies prepared and used for detection of acute virus necrobiotic disease virus in scallop Chlamys farreri by indirect ELISA].

For developing monoclonal antibodies against acute virus necrobiotic disease (AVND) virus, mice of Balb/c strain were immunized with AVND virions which were isolated from the infected scallop Chlamys farreri. The spleen cells from immunized mice were then fused with NS-1 myeloma cells and the hybridomas were screened by means of enzyme-linked immunosorbent assay (ELISA) and immunofluorescence assay (IFA). Finally, 4 stable MAbs of IgG isotype were obtained. Moreover, the combined position of these 4 MAbs to this virus was examined by immunogold electron microscopy (IEM). The results demonstrate that all 4 MAbs recognized epitopes on the envelope of the virions. Subsequently, a MAb-based ELISA was developed and used for detection of the infection rate and densities of the scallops which were sampled during different seasons from mid-April to mid-October, 2003. The result exhibited that both of the infection rate and infection densities sharply rose in mid-July and reached to the spikes, which right corresponds with their mortality during this period.