title: A new method for rapid identification of influenza virus isolates.
abstract: With the use of bacteria sensitized by influenza virus strain-specific antisera, virus isolates can be identified rapidly. One drop of virus suspension is mixed with one drop of sensitized bacteria on a slide that is then agitated; reaction occurs within 10 minutes. The test is subtype-specific. The mehod is based on the fact that the cell wall of the Cowan type 1 strain of Staphylococcus aureus contains abundant quantities of an antigen, known as protein A, that reacts with the IgG molecule by binding it in such a manner that the antibody-combining sites remain free. If an antigen homologous to the antibody coated on the surface of the bacteria is added to the suspension of sensitized staphylococci, agglutination occurs.
mesh_terms: D006386:Hemagglutination Tests / Q000379:methods; D009975:Orthomyxoviridae / Q000302:isolation & purification*