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When Mantoux Test Is Positive?

Sophia Al-Mansoor • • 7 min read
When Mantoux Test Is Positive?

The test is "positive" if there is a bump of a certain size where the fluid was injected. This means you probably have TB germs in your body. Most people with a positive TB skin test have latent TB infection

latent TB infection
Latent tuberculosis (LTB), also called latent tuberculosis infection (LTBI) is when a person is infected with Mycobacterium tuberculosis, but does not have active tuberculosis.
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. To be sure, your doctor will examine you and give you a chest x-ray.

What happens if Mantoux test is positive?

If the Mantoux results are positive, then the doctor will ask for blood tests or X-ray of your chest. Also there could also be tests to check for infection through your sputum. Finally, urine or tissue samples can also be collected for testing if the doctor has diagnosed that the infection is spreading.

When is a Mantoux positive?

A reaction of 6mm or greater, indicates a response of the immune system due to either TB infection, infection with environmental mycobacteria or previous BCG vaccination (BCG vaccinated persons normally become tuberculin positive after 4-8 weeks).

Sophia Al-Mansoor
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Sophia Al-Mansoor

Sophia analyzes international trade, startup ecosystems, retail transformation, and supply chain logistics for modern digital publications.