Rickettsiaiggigmpnlser

What is this test?

The Rickettsia IgG and IgM panel is a blood test that checks for antibodies your immune system produces in response to Rickettsia bacteria. These bacteria are typically transmitted through bites from infected ticks, fleas, or lice. The test measures two types of antibodies: IgM (which appear early in infection) and IgG (which develop later and can indicate past infection or immunity).

Why is this test ordered?

Your doctor may order this test if you have symptoms of a rickettsial infection, especially if you have been exposed to ticks or have recently traveled to areas where these infections are common. Symptoms may include fever, headache, rash (often starting on wrists and ankles), and muscle pain. Early diagnosis is important because these infections can become severe if not treated promptly with antibiotics.

How is the test performed?

A healthcare professional will draw a blood sample from a vein in your arm. The blood is then sent to a laboratory where technicians test it for the presence of Rickettsia-specific IgG and IgM antibodies. You may need to have repeat testing 2-4 weeks apart to look for changes in antibody levels, which helps confirm an active infection.

What do the results mean?

Results are typically reported as positive or negative for IgG and IgM antibodies. A positive IgM result with negative IgG suggests a recent or current infection. Positive IgG (with or without IgM) may indicate a past infection or immunity. Your doctor will interpret these results along with your symptoms, exposure history, and possibly other test results to make a diagnosis.