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Jun 30, 2023 · Is There a Blood Test for Lyme Disease? If your doctor suspects that you have Lyme disease, they may order two blood tests. These will look for signs that your body is trying to fight it off.
Jan 8, 2024 · Western blot results list levels of IgM and IgG antibodies. These results come in the form of bands. For recent exposure (within four weeks), two out of a possible three IgM bands indicate positive results. For remote exposure (greater than four weeks) five out of 10 IgG bands indicate positive results.
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Feb 10, 2023 · If you live where Lyme disease is common, the rash might be enough for a diagnosis. A diagnosis usually depends on the following: A review of all signs and symptoms. A history of known or possible exposure to ticks. Blood tests to find disease-fighting antibodies to the bacteria.
If a physician is suspicious of Lyme disease but cannot make a diagnosis by the rash, then the antibody test in that first stage should be repeated 3 to 4 weeks later since a Lyme disease diagnosis can be missed with a false negative test in the first few weeks.
If your first test result is negative for Lyme disease, you don't need any more testing. If your first result is positive for Lyme disease, your blood will get a second test. If both results are positive for Lyme disease and you also have symptoms of infection, you probably have Lyme disease.
Medical Tests →. Lyme Disease Tests. What are 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.
Erythema migrans (EM)— Red annular or homogeneous rash at the site of tick bite; expands gradually over several days to >5 cm in diameter; central clearing may develop as the rash expands, resulting in a “target” or “bull’s-eye” appearance; may feel warm to the touch but rarely itchy or painful. EM occurs in 70-80% of infected persons.
