Tuberculosis Skin Test: What To Expect, Diagnosis, And Symptoms
The tuberculin skin test (also known as the Mantoux test) is a method used to determine if someone has been exposed to Mycobacterium tuberculosis bacteria. Here’s what you need to know:
What to Expect• The test involves injecting a small amount of tuberculin antigen into the skin.
• After 48-72 hours,
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• If there’s swelling or reddening (called induration), it may indicate exposure to TB bacteria.
DiagnosisA positive result means you’ve been exposed to TB. However, it doesn’t necessarily mean you have active TB disease; it could mean you were exposed in the past.
SymptomsIf you test positive and later develop symptoms like cough, fever, night sweats,
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What to expect with the tuberculosis skin test
The tuberculin skin test (TBST) is a common method used to determine if someone has been exposed to Mycobacterium tuberculosis (MTB), the bacteria that causes tuberculosis (TB). This test helps identify individuals who may have been infected in the past, even if they never developed active disease.
Before taking the TB skin test, it's important to discuss any history of TB exposure or infection with your healthcare provider. The test is usually performed on the inner forearm, and a small injection of TB antigen is made. The skin reaction, called a tuberculin manifold (or Mantoux test), appears within
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After the injection, you'll need to return to the clinic or doctor's office for the reading. A healthcare professional will check the area for swelling and redness. The size of the reaction indicates whether you've been exposed to TB bacteria. If you cherished this article and you also would like to get more info with regards to injectable
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Suggested Reading - generously visit the web site. A positive result means you have antibodies in your system, indicating potential exposure, while a negative result suggests no exposure.
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What do the results of a TB test mean?
A positive TB skin test indicates that your immune system has reacted to the TB antigen, suggesting prior exposure or infection. However, it doesn't necessarily mean you have active TB disease; most people with a positive result are latent TB cases, meaning they are infected but not symptomatic.
If you test positive, further evaluation is needed to determine if you have latent TB or active disease. This may involve chest X-rays, CT scans, sputum tests (to check for M. tuberculosis in phlegm), and blood tests to assess your immune response.
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Diagnosis
The diagnosis of TB is typically confirmed through several methods:
X-rays and CT scans: These imaging tests can detect changes in the lungs that may indicate active TB, such as nodules or cavities.
Sputum tests: Cultures of sputum (mucus coughed up) are taken to identify M. tuberculosis bacteria.
Blood tests: These can measure levels of TB-specific antibodies or immune response.
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Symptoms
Individuals with latent TB may experience subtle symptoms, such as:
Coughing up mucus (sputum) that may contain TB bacteria.
Fatigue or weakness.
Night sweats and unexplained weight loss.
Fevers or chills, though these are less common.
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Outlook
The outlook after a positive TB skin test result depends on whether you have latent or active TB. With proper treatment, such as antibiotics and immune therapy (e.g., isoniazid prophylaxis), individuals with latent TB can prevent progression to active disease and reduce the risk of transmitting TB
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If you've tested negative for the
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www.kwangheung.com - TB, you may not need follow-up unless there's a high risk of exposure or suspicion of recent infection. Always consult your healthcare provider for personalized advice.
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How we reviewed this article:
Medical News Today adheres to strict editorial policies, ensuring that all content is accurate and evidence-based. We only rely on credible sources, including peer-reviewed studies and medical guidelines, to ensure the information provided is reliable and up-to-date.
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Latest news
Stay informed about the latest developments in tuberculosis research and treatment by exploring our related articles and updates on advancements in TB diagnosis and care.
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Related Coverage
Explore more articles on tuberculosis, including information on symptoms, prevention, and new treatments:
Understanding latent TB infectionWhat is active TB?TB prophylaxis: How to prevent progressionDiagnosis of TB: What you need to know
