Lab marker · High

High Lyme antibody (Borrelia serology): what it means

A Lyme antibody (Borrelia serology) result above the normal range is considered high. Here is what a raised Lyme antibody (Borrelia serology) can point to, and when it is worth discussing with a doctor.

Reference range: Reported as negative or positive, usually via a two-tier scheme (a screening ELISA confirmed by a Western blot); negative is expected — a positive supports exposure to the Lyme bacterium but must be read with symptoms and tick-exposure history, as antibodies persist after past infection

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What a high Lyme antibody (Borrelia serology) can mean

  • A positive two-tier result — supports exposure to the Lyme bacterium, read alongside symptoms and tick exposure.
  • Later-stage Lyme disease — joint, nerve or heart involvement usually shows clear antibodies.
  • Past, treated infection — antibodies can persist for years, so a positive test does not always mean current disease.
  • A false-positive screening test — why the confirmatory second tier is essential.

When to discuss with a doctor

Lyme serology is used when Lyme disease is genuinely possible — a compatible illness in someone with realistic tick exposure — rather than as a general screen for non-specific symptoms, where it performs poorly. In very early disease with the classic bull's-eye rash, treatment is given on the clinical picture without waiting for the test, since antibodies may not have appeared. A positive two-tier result supports the diagnosis but is always interpreted with the timing, symptoms and exposure history, remembering that antibodies persist after past infection. The test should not be used to judge whether treatment worked. Mediora.AI shows the Lyme antibody result in context with inflammatory markers; whether it reflects active disease, and any treatment, is a decision for your doctor with the full clinical picture.

Conditions this can relate to

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Mediora.AI is informational - interpretation, not a diagnosis. A single out-of-range value is common and often benign; always discuss decisions with your doctor.