What laboratory test is most useful for diagnosing tuberculosis?

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Question: What laboratory test is most useful for diagnosing tuberculosis?

Options:

Correct Answer: Acid-fast bacilli smear

Solution:

The acid-fast bacilli smear is a key diagnostic test for tuberculosis, as it detects the presence of Mycobacterium tuberculosis.

What laboratory test is most useful for diagnosing tuberculosis?

What laboratory test is most useful for diagnosing tuberculosis?

Step 1: Understand that tuberculosis (TB) is caused by a bacteria called Mycobacterium tuberculosis.
Step 2: Know that to diagnose TB, doctors need to find this bacteria in a sample from the patient.
Step 3: The acid-fast bacilli (AFB) smear test is a laboratory test that helps find the bacteria.
Step 4: In this test, a sample (usually sputum or mucus) is taken from the patient.
Step 5: The sample is then stained and examined under a microscope to see if the bacteria are present.
Step 6: If the bacteria are seen, it indicates that the patient may have tuberculosis.

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