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TB – Mantoux Tuberculin Skin Test and AFB Stain

Original price was: ₹ 1,400.00.Current price is: ₹ 800.00.

Category:

Description

sample requiredSample Required:

Mantoux Tuberculin Skin Test: This test requires a small injection of tuberculin purified protein derivative (PPD) just under the top layer of the skin.

AFB Stain: For the Acid-Fast Bacilli (AFB) stain, a sample of sputum, urine, or other bodily fluids may be needed.

test timeTest Time:

Mantoux Tuberculin Skin Test: The skin reaction is typically read 48 to 72 hours after the injection.

AFB Stain: Results are usually available within a few hours to a few days, depending on the laboratory’s processing time.

test normal rangeTest Normal Range:

Mantoux Tuberculin Skin Test: The test measures the size of the induration (raised, hardened area) at the injection site. Interpretation depends on risk factors and varies by region.

AFB Stain: Normal results for the AFB stain would show no acid-fast bacilli, indicating the absence of Mycobacterium tuberculosis.

what is the testWhat is the Test:

Mantoux Tuberculin Skin Test: This test checks for a delayed-type hypersensitivity reaction to proteins derived from Mycobacterium tuberculosis. It’s used to screen for tuberculosis (TB) infection.

AFB Stain: The Acid-Fast Bacilli (AFB) stain is a microscopic test that identifies acid-fast bacteria, such as Mycobacterium tuberculosis, in clinical specimens.

test procedureTest Procedure:

Mantoux Tuberculin Skin Test:

A small amount of PPD is injected under the skin, usually on the forearm. The injection site is checked 48 to 72 hours later for a raised, hardened area (induration). The size of the induration is measured and interpreted based on risk factors.

AFB Stain:

A sample of sputum, urine, or other relevant bodily fluids is collected. Special stains are applied to the sample, and it is examined under a microscope for the presence of acid-fast bacilli.

when to take the testWhen to Take the Test:

Mantoux Tuberculin Skin Test: It may be recommended when there is suspicion of TB infection or as part of routine TB screening.

AFB Stain: This test is typically ordered when there are signs and symptoms of TB, such as persistent cough, fever, and weight loss.

who should take this testWho Should Take This Test:

Mantoux Tuberculin Skin Test: Individuals at risk for TB, including healthcare workers, close contacts of TB patients, and those with specific risk factors.

AFB Stain: Individuals with symptoms suggestive of TB, as determined by a healthcare provider.

precautions for exceptional casesPrecautions for Exceptional Cases (Pregnancy, etc.):

Pregnancy: The Mantoux Tuberculin Skin Test is generally considered safe during pregnancy. However, the decision to test pregnant individuals should be made in consultation with a healthcare provider, weighing the potential benefits and risks.

 

FAQs (Frequently Asked Questions):

Q1: What does a positive Mantoux Tuberculin Skin Test mean? 

A: A positive result indicates exposure to TB or TB infection. Further evaluation, such as a chest X-ray and possibly treatment, may be needed.

Q2: Can the Mantoux Tuberculin Skin Test differentiate between latent TB infection and active TB disease? 

A: No, it cannot. A positive result indicates exposure to TB or TB infection, but additional tests are needed to determine if the infection is latent or active.

Q3: How is TB treated if it’s confirmed by the AFB stain? 

A: If TB is confirmed, a healthcare provider will prescribe a combination of antibiotics for several months to treat the infection.

Q4: Is it necessary to isolate someone with a positive AFB stain result? 

A: Isolation measures may be necessary for individuals with confirmed active TB disease to prevent its spread. This decision is made by healthcare authorities.

Q5: Is the Mantoux Tuberculin Skin Test the same as the TB blood test (IGRA)? 

A: No, they are different tests. The Mantoux test involves injecting a substance under the skin, while the TB blood test (Interferon-Gamma Release Assays or IGRA) measures the immune response to TB proteins in a blood sample.

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