What is the confirmatory test for TB?

What is the confirmatory test for TB?

• A. Blood culture
• B. CCT within 10 days
• C. Skin test only
• D. Urine analysis

Answer: (B)

The confirmatory test for Tuberculosis (TB) is actually the culture of the TB bacteria from a sample, typically obtained from sputum. While the option provided regarding "CCT within 10 days" may relate to the timeline of a test, it does not accurately identify the standard confirmatory testing used for TB diagnosis. The tuberculin skin test (often referred to as the Mantoux test) is a screening test and is not definitive because it can yield false positives or negatives depending on prior exposure to TB or other factors. While a blood culture can indicate an infection, it is not routinely used as a confirmatory test for TB specifically. Urine analysis is also not relevant for confirming TB, and while it can be used in some contexts, it is not a standard approach for confirming active TB either. In practice, the definitive diagnosis of TB is established through culture methods, and other tests, such as various molecular tests (like PCR), can be utilized to confirm active TB disease.

The confirmatory test for Tuberculosis (TB) is actually the culture of the TB bacteria from a sample, typically obtained from sputum. While the option provided regarding "CCT within 10 days" may relate to the timeline of a test, it does not accurately identify the standard confirmatory testing used for TB diagnosis.

The tuberculin skin test (often referred to as the Mantoux test) is a screening test and is not definitive because it can yield false positives or negatives depending on prior exposure to TB or other factors. While a blood culture can indicate an infection, it is not routinely used as a confirmatory test for TB specifically. Urine analysis is also not relevant for confirming TB, and while it can be used in some contexts, it is not a standard approach for confirming active TB either.

In practice, the definitive diagnosis of TB is established through culture methods, and other tests, such as various molecular tests (like PCR), can be utilized to confirm active TB disease.