Simple method to detect virus-specific IgM antibodies in patients' serum samples after immunosorption of immunoglobulins G and A

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Abstract
By absorption with protein A and specific immunosorption using insolubilized adsorbentia (CPG), a method was developed for rapid elimination of IgG and IgA from patients' serum samples. This test technique was examined in the diagnosis of rubella infections, i.e., rubella-specific IgM antibodies. The procedure has proven to be as reliable as determinations carried out with IgM fractions separated on a sucrose density gradient.