Do Metal Braces Affect Saliva Rapid Testing Results?

Saliva rapid test

Will metal braces affect the results of a saliva rapid test? Recently, I had redness and peeling under my left armpit, but it disappeared on its own after two days.
Could this be a symptom of HIV?

A, 30~39 year old female. Ask Date: 2023/07/27

Dr. Liao Zhongxin reply Internal Medicine

1.
Braces will not affect the screening results, as rapid tests have a certain specificity.
2.
If there is oral inflammation or infection, it should be associated with swollen cervical lymph nodes, rather than axillary ones.

Reply Date: 2023/07/27

More Info

Metal braces, commonly used in orthodontics to straighten teeth, can potentially affect saliva rapid testing results, although the extent of this impact may vary. Saliva tests are often used for various purposes, including the detection of certain infections, drugs, or even HIV. The presence of metal braces could interfere with the collection and composition of saliva samples, leading to potential inaccuracies in test results.

When metal braces are present, they can alter the flow of saliva and may also introduce foreign materials into the sample. This could affect the concentration of biomarkers that the test is designed to detect. For instance, if a saliva test is looking for specific antibodies or viral RNA, the presence of metal could potentially dilute or otherwise alter the sample, leading to false negatives or positives. Therefore, it is advisable to inform the healthcare provider conducting the saliva test about the presence of braces, as they may recommend alternative testing methods or take additional precautions to ensure accurate results.

Regarding your concern about the red, swollen, and peeling area under your left armpit, it is essential to understand that while skin changes can be associated with various conditions, they are not definitive indicators of HIV. HIV symptoms can vary widely and often do not manifest until several weeks to months after exposure. Common early symptoms of HIV infection may include flu-like symptoms, fever, fatigue, and swollen lymph nodes, but skin rashes and localized symptoms like those you described are not typical early signs of HIV.

The skin changes you experienced could be due to a variety of factors, including allergic reactions, fungal infections, or other dermatological conditions. It is crucial to monitor the area for any changes and consult a healthcare professional for a thorough evaluation. They can provide a proper diagnosis and determine if any further testing, including HIV testing, is necessary based on your risk factors and symptoms.

In summary, while metal braces can potentially affect saliva rapid testing results, it is essential to communicate this to your healthcare provider. As for the skin symptoms you experienced, they are not specific to HIV and could be due to various other causes. If you have concerns about HIV or any other health issues, seeking medical advice is the best course of action. Regular check-ups and open communication with your healthcare provider can help address any health concerns you may have.

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