Lyme disease antibody
What this test measures
The Lyme test looks for antibodies to Borrelia, the bacterium carried by ticks. It can be negative in the first weeks after a bite, and a positive screen is confirmed by a second test.
Why doctors request it
Requested after a tick bite with a spreading rash or later symptoms such as joint or nerve problems.
What commonly pushes it up
- Lyme disease, usually from a few weeks after infection
- Past infection, since antibodies persist
- Occasionally a false positive on the screening test with other infections
What commonly pushes it down
- A negative result is the usual finding
Everyday reasons for a value outside the range
- Results can be equivocal and are then repeated
- Recent vaccination or infection elsewhere can occasionally give a weak positive
About the sample
No fasting needed.
Upload a photo or PDF and see every line against the range your lab printed, explained in plain English. First report free.
Read my report freeThis is an educational summary of results you uploaded. It is not medical advice, a diagnosis or a treatment plan, and it does not replace the doctor who requested the test. If you are worried, or a result is marked outside range, discuss it with your doctor. Written and reviewed by a UK consultant physician. Reference ranges vary between laboratories.