[The development of immune enzyme test-systems for detecting potentially pandemic influenza viruses subtype A(H2), A(H5), A(H7) and A(H9).]

To develop diagnostic test-systems constructed according principle of "sandwich" enzyme-linked immunosorbent assay to detect antigens of influenza viruses with pandemic potential: A(H2), A(H5), A(H7), A(H9).The panels of subtype-specific monoclonal antibodies interacting with molecule of hemagglutinin of potentially pandemic viruses of influenza are obtained and characterized. The viruses of every sub-type were supplied with selected pairs monoclonal antibodies/monoclonal antibodies' conjugate with peroxidase of horse-radish, interacting most effectively with virus-immunogen and lacking non-specific activity related to influenza viruses of geterologic types. Considering established threshold values, the sensitivity of test-systems varied depending on sub-type and strain of viruses within limits of 4 - 30 ng/ml at evaluation of viral purified concentrates and 0.3 - 8 hemagglutinin units at analysis of virus-containing allantoic fluid. The specificity of immune-enzyme test-system manifested in conditions of absence of non-specific interactions with both seasonal and potentially pandemic geterologic viruses. The technique can be applied for fast identification of viruses of influenza non-typeable in conditions of routine functioning of practical laboratories.