Test guide
Lyme Disease Tests
Lyme disease is an infection caused by bacteria you get from tick bites . Lyme disease tests look for signs of infection in a sample of your blood or cerebrospinal fluid (CSF). CSF is a clear liquid that flows in and around your brain and spinal cord. The test checks your sample for antibodies that your immune system makes to fight the bacteria that cause Lyme disease.
What it is for
Lyme disease tests are used to find out if you have a Lyme disease infection. Your health care provider is most likely to order the test if you have symptoms that could be Lyme disease, and if you were exposed or possibly exposed to infected ticks. In the United States, infected ticks are most commonly found in states in the: Source: MedlinePlus, National Library of Medicine. Medical test information is public domain. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Limitations
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
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