The TB Gold test, also known as the Tuberculin Skin Test (TST), is a diagnostic test used to detect the presence of tuberculosis (TB) infection. It is a simple test that involves injecting a small amount of a protein called tuberculin into the skin, usually on the lower part of the arm, and observing the area for a reaction.

Pre-test preparation for a TB Gold test typically does not require any special preparation. The test can be performed at any time and there is no need to fast or stop taking any medications.

The testing method for TB Gold test involves injecting a small amount of tuberculin into the skin, usually on the lower part of the arm. The test is read 48-72 hours after the injection, the healthcare professional will look for a raised, hard, red bump, indicating a positive reaction to the test.

Common symptoms that may prompt a healthcare provider to prescribe a TB Gold test include symptoms of active TB such as a persistent cough, chest pain, or difficulty breathing. Other symptoms may include fever, night sweats, or weight loss.

A positive test result from a TB Gold test can indicate the presence of a TB infection. However, it’s important to note that a positive test result does not confirm the presence of active TB and other tests such as chest X-ray, sputum culture and PCR tests may be needed to confirm the diagnosis.

The reference range for TB Gold test is based on the size of the reaction to the test. A positive test result is usually considered if the reaction is greater than 5 mm. However, it’s important to note that the test results can vary based on the lab and the specific test used.

A normal value for TB Gold test is considered to be a negative result, meaning no reaction or a reaction smaller than 5 mm. However, it’s important to note that a negative test result does not guarantee the absence of TB infection, and other tests such as chest X-ray, sputum culture and PCR tests may be needed to confirm the diagnosis.
It’s also important to consult with a healthcare professional to interpret test results and to understand how they may be affected by individual factors such as medical history, symptoms, and other lab test results.