Ordering the Rickettsia rickettsii/typhi IgG Antibody Test
Testing for Rickettsia rickettsii/typhi IgG Antibody helps detect past or ongoing infections caused by bacteria linked to Rocky Mountain spotted fever and typhus. This test is especially useful for people who have symptoms like fever, headache, muscle pain, or rash after a tick bite or travel to areas where these infections are more common. Interestingly, some people may not develop a rash, which is often thought to be a key sign, making this test helpful even when classic symptoms are missing.
Ordering this test can help you:
- Identify if your symptoms are due to a Rickettsia infection.
- Support your doctor in choosing the right treatment plan.
- Track your immune response to these bacteria over time.
- Rule out other causes of similar symptoms, such as viral infections.
- Provide documentation for work or school if needed.
Who Should Consider Rickettsial Antibody Testing
People who have recently spent time in wooded or grassy areas and now feel unwell with fever, chills, or body aches may benefit from this test. For example, someone who went hiking and later developed a headache, fatigue, and a spotted rash might want to check for a Rickettsia infection.
Ordering this test may also be helpful in these situations:
- After a known tick bite followed by new symptoms.
- When a doctor suspects Rocky Mountain spotted fever or typhus based on your symptoms and travel history.
- If you have a rash and joint pain that started after outdoor activities.
- When you have unexplained fever and swollen lymph nodes.
- For people with a history of exposure to fleas or lice, since these can also spread Rickettsia bacteria.
Testing can help confirm if your symptoms are due to a Rickettsia infection, which can guide your doctor in starting the right treatment and prevent possible complications. Delaying this test could mean missing the best window for early treatment, which may lead to longer recovery or more severe symptoms.
Preparing for Rickettsia Antibody Screening
Fasting is not needed before this test, so you can eat and drink as usual. Make sure to carefully follow any instructions your doctor or healthcare provider gives you to help the process go smoothly and avoid any delays.
Labs Included When Ordering Your Rickettsia rickettsii/typhi IgG Antibody Test
| Test Name | Reference Range | Significance | Low and High Levels of Rickettsia rickettsii/typhi IgG Antibody |
|---|---|---|---|
| Rickettsia rickettsii/typhi IgG Antibody | Negative: <1:64 Equivocal: 1:64–1:128 Positive: >1:128 |
This test checks for IgG antibodies to Rickettsia rickettsii and Rickettsia typhi, which are bacteria that cause Rocky Mountain spotted fever and typhus. Detecting these antibodies helps show if you have been exposed to or infected by these bacteria. |
High levels mean your body has produced antibodies, suggesting a current or past infection with Rickettsia rickettsii or typhi.
Low levels mean there is little or no evidence of exposure to these bacteria, or it may be too early in the infection for antibodies to appear. |
Reference ranges may change slightly as labs update their methods or as new research becomes available. Always check your report for the most current information.
Rickettsia rickettsii/typhi Antibody FAQ
Is there Rickettsia rickettsii/typhi IgG Antibody testing near me?
This is a test kit that you can collect locally, and you can check the draw location link at the top of the page. Since symptoms like fever and rash can appear quickly after a tick bite, having a nearby collection site makes it easier to get tested without delay.
How do I interpret the test results?
While your treating physician should review your results, you can also use our one-on-one test results review service with our clinical team for a detailed explanation and next steps.
What is the cost of the test?
The price listed for this test includes standard shipping to you and back to the lab, but draw fees may apply. Ordering this test can help you find out if your symptoms are due to a Rickettsia infection, which can help you get the right treatment sooner.
How often should I retest?
Retesting is usually recommended 2–4 weeks after the first test if symptoms continue or if your doctor wants to check for changes in antibody levels. This helps track your immune response and can show if a recent infection is resolving or if further treatment is needed.
How accurate is the test?
This test uses an indirect immunofluorescence assay (IFA) to detect IgG antibodies, with a specificity of 98% and a sensitivity of 94%. TrueHealthLabs.com partners with CLIA-certified and CAP-certified laboratories to uphold rigorous testing standards for dependable results.
Important Notes
None.
Medical Review Board
Reviewed by Jeff Donohue M.D. from Body Logic and Brady Hurst DC, CCCN. Written by True Health Lab’s team of editorial health contributors.
Disclaimer: This information is for educational purposes only and not intended as medical advice. Consult your healthcare provider for personalized guidance.
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