Table of Contents
What does negative Lyme IgG mean?
If your results are negative shortly after you’ve been infected, the result could be a false-negative. A positive result means that Borrelia antibodies were found and that you may have had or have Lyme disease. False-positive results sometimes do occur.
What does Lyme IgG IgM AB mean?
What does it mean if your Lyme Disease AB (IGM), Blot result is too high? Two types of antibodies are detected in the Western blot test. IgM antibodies reflect a relatively recent infection. IgG antibodies in contrast are a sign of an older infection. IgM antibodies usually disappear after eight weeks post-exposure.
What is normal range for Lyme disease?
Reference Range Normal levels vary depending on the laboratory assay performed, as follows. Borrelia burgdorferi antibody enzyme immunoassay (Lyme index value) : < 0.9 = negative. 0.91-1.09 = equivocal.
What does a negative Lyme test mean?
There are many reasons why someone who actually has Lyme may have a negative test result. There may not have been time for antibodies to develop; the immune system may be suppressed; or the person may be infected with a strain the test doesn’t measure.
Can you test negative and still have Lyme disease?
Antibodies against Lyme disease bacteria usually take a few weeks to develop, so tests performed before this time may be negative even if the person is infected. In this case, if the person is retested a few weeks later, they should have a positive test if they have Lyme disease.
What is a Lyme AB screen?
A Lyme disease blood test is used to determine if you have contracted Borrelia burgdorferi (B. burgdorferi), the bacterium that causes Lyme disease. Lyme disease tests are conducted with a routine blood draw.
What does a positive IgG band 45 mean?
Two types of antibodies are detected in the Western blot test. This particular marker is called 45 KD (IGG) Band and hence is a IgG antibody marker. IgG antibodies are a sign of an older infection. In contrast, IgM antibodies reflect a relatively recent infection.
What does it mean if IgG is positive?
The presence of IgG suggests that the infection happened weeks to months in the past. It also suggests that you may no longer be infectious. IgG indicates that you may have some immunity to the virus, though you may not.
Can you have Lyme disease even if test is negative?
How common are false negative Lyme tests?
Lyme disease is known to inhibit the immune system and 20-30\% of patients have falsely negative antibody tests.