Anti-Borrelia burgdorferi IgG antibody (serum/plasma)

This test measures a specific substance, marker, or cell level in your body, and the results help your healthcare provider understand how well certain organs or systems are working. Your provider will explain exactly what is being measured and what your numbers mean for your overall health and ongoing care.

The test looks for IgG antibodies specific to *Borrelia burgdorferi*, a bacterium transmitted through tick bites. These antibodies indicate an immune response, which may suggest past infection. IgG antibodies typically appear weeks to months after exposure and can persist long-term.

Your doctor may order this test if you have symptoms that need evaluation, if you have a condition that requires regular monitoring, or as part of a routine checkup. The results can help confirm a diagnosis, track how well a treatment is working, or screen for possible health concerns before symptoms appear.

Your healthcare provider may order this test if you have symptoms like joint pain, fatigue, or a rash (erythema migrans) that could be linked to Lyme disease. It may also be used in cases of recurrent symptoms or after a tick bite, especially in high-risk areas.

For this test, a small sample of blood is typically drawn from a vein in your arm by a trained phlebotomist, or it may be collected with a simple finger stick. Little to no preparation is needed, but you should tell your provider about any medications, vitamins, or supplements you take, since some can affect your results.

A blood sample is drawn from a vein in your arm. The blood is processed to separate serum or plasma, which is then tested for IgG antibodies using an immunoassay method. This test does not require fasting.

Before the test, your healthcare provider will review your medical history and explain why the test is being done. You can usually eat and drink normally unless your provider gives you other instructions, and you should keep taking your regular medications unless told otherwise. The appointment typically takes only a few minutes, and you can let the staff know if you feel uneasy about needles.

No special preparation is needed. Wear comfortable clothing and bring any medications you’re currently taking, as some may affect test results.