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What is a TB Skin Test?

The TB Skin Test, also called the Mantoux test, is a simple and effective way to determine whether a person has been exposed to the bacteria that causes tuberculosis (TB). TB is a serious bacterial infection that primarily affects the lungs but can also impact other parts of the body. The skin test does not diagnose active TB disease but helps identify latent (inactive) TB infection.

How the TB Skin Test Works

  1. Step 1: Administration
    A small amount of purified protein derivative (PPD) is injected just under the top layer of skin on your forearm using a tiny needle. This only takes a few seconds and may cause slight discomfort.
  2. Step 2: Wait 48–72 Hours
    You must return to the testing site within 48 to 72 hours to have the injection site examined. This timeframe is essential for accurate results.
  3. Step 3: Reading the Results
    A trained medical professional will inspect and measure any swelling or raised area at the injection site. Based on the size and your medical history, the result will be interpreted as positive or negative.

What Do the Results Mean?

  • Negative: No significant swelling—likely no TB infection.
  • Positive: A raised, hard area is present—further testing (like a chest X-ray or blood test) may be needed to check for active or latent TB infection.

Who Should Get Tested?

  • Healthcare workers and caregivers
  • Students and staff entering school or healthcare programs
  • Individuals with weakened immune systems
  • People who have been in close contact with someone with TB
  • Employees of nursing homes, correctional facilities, or shelters

Schedule Your TB Skin Test Today

Jes Health Services makes TB testing quick and convenient. We offer in-clinic and mobile TB testing at your home, school, or workplace.