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Minnesota State University, Mankato
Minnesota State University, Mankato

Mantoux Test

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A mantoux is a test that determines if you have been exposed to and formed antibodies to tuberculosis (TB).

A nurse will administer the mantoux test by giving you a small injection just under the skin of your arm.

To be valid the test must be evaluated by a nurse between 48 and 72 hours (2–3 days) after the injection by looking at the injection site on your arm.

Depending on the appearance of the test site it will be considered "negative" or "positive". A negative test is normal and requires no further evaluation.  A positive test does not necessarily mean that you are ill.  A positive test means you have been exposed to the tuberculosis bacteria at some time and have formed antibodies.  Further evaluation is recommended.  The nurse or doctor will go over the recommendations with you if you have a positive test.