IgM antibodies appear early in response to infection therefore, this test may be positive between 2 to 6 weeks after exposure. burgdorferi after possible exposure to an infected tick. The Lyme IgM antibody ELISA is a serological test for the detection of IgM antibodies to B. NOTE: The sensitivity concerns mentioned for the IgG/IgM assay also affect this assay.īorrelia burgdorferi Antibody Serology IgM But since the level of IgM rapidly declines over time, testing for IgM antibodies too late can cause a missed infection.Ī positive or equivocal IgM antibody test must be confirmed by an IgM Western Blot or Lyme ImmunoBlot IgM. Because IgM antibodies appear early in response to infection, this test may be positive two to six weeks after exposure. burgdorferi after exposure to an infected tick. The IgG/IgM Antibody Serology test is an ELISA (enzyme linked immunoassay) format, and it detects the presence of IgM antibodies to B.
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