In a laboratory diagnosis of tuberculosis, which test is most commonly used to assess cell-mediated immunity?
Correct Answer: Mantoux test
- Step 1: Understand that tuberculosis (TB) is an infection caused by a bacteria called Mycobacterium tuberculosis.
- Step 2: Know that the immune system has different ways to respond to infections, and one important response is called cell-mediated immunity.
- Step 3: Learn that the Mantoux test is a specific test used to check if someone has been exposed to the TB bacteria.
- Step 4: Realize that the Mantoux test involves injecting a small amount of a substance called tuberculin into the skin.
- Step 5: After 48 to 72 hours, a healthcare provider checks the injection site for a reaction, which indicates cell-mediated immunity to TB.
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