Lab marker · Low

Low Lyme antibody (Borrelia serology): what it means

A Lyme antibody (Borrelia serology) result below the normal range is considered low. Here is what a reduced 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 low Lyme antibody (Borrelia serology) can mean

  • Negative — the expected result; no antibodies detected.
  • Very early infection — antibodies may not have formed yet, so early Lyme with the classic rash is treated on the clinical picture regardless.
  • No exposure — no evidence of Lyme.

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.