Sputum AFB Test

What Does a Sputum AFB Test Measure?

The test detects the presence of acid-fast bacilli (AFB) in sputum—bacteria that retain the red dye even after exposure to acid-alcohol decolorization, a feature typical of mycobacteria.

This helps in:

• Diagnosing active pulmonary tuberculosis
• Assessing infectiousness (bacterial load correlates with transmissibility)
• Monitoring treatment effectiveness over time
• Supporting public health surveillance and TB control

Sputum AFB Test: Who Needs It and Why It’s Done

Who Should Get a Sputum AFB Test?

Doctors may recommend this test if you have symptoms suggestive of pulmonary TB, such as:

• Persistent cough lasting more than 2–3 weeks
• Coughing up blood (haemoptysis)
• Chest pain or shortness of breath
• Unexplained weight loss or fatigue
• Night sweats and prolonged fever

It is also recommended for:

• People with a history of TB exposure
• HIV-positive or immunocompromised individuals
• Patients under TB treatment for follow-up monitoring

Why is a Sputum AFB Test Done?

The Sputum AFB Test is done to:

• Confirm active tuberculosis infection
• Determine if a person is infectious
• Evaluate the effectiveness of TB treatment
• Guide infection control measures in healthcare settings
• Support screening of high-risk individuals when clinically indicated

Importance of a Sputum AFB Test

This test is a key diagnostic tool in TB control programs because it:

• Provides rapid and affordable results
• Helps initiate early treatment, reducing transmission risk
• Detects bacterial load, aiding assessment of disease severity and contagiousness
• Plays an essential role in monitoring treatment success

When combined with molecular tests (e.g., GeneXpert) or culture methods, it contributes to a more complete diagnosis, including evaluation for drug resistance.

Sputum AFB Test Booking & Reports – Metropolis Healthcare

How to Book the Sputum AFB Test and Get Your Reports

1. Simple Online Booking
   Book your test through the Metropolis Healthcare website or mobile app. Choose the Sputum AFB Test, select a convenient time slot, and opt for home sample collection or visit your nearest lab.
2. Safe Sample Collection
   You will be guided to provide an early morning sputum sample in a sterile, leak-proof container. The sample should be from deep cough sputum, not saliva.
3. Sample Tracking
   Track your sample and report status via the Metropolis Healthcare app or website.
4. Accurate Laboratory Testing
   Your sample is tested in NABL & CAP accredited laboratories using Ziehl-Neelsen staining and microscopy.
5. Quick & Easy Reports
   Receive your report within 6 hours via email, WhatsApp, or the Metropolis app.

Is Home Sample Collection for Sputum AFB Test Available Near You?

Yes. Metropolis Healthcare provides doorstep sample collection for sputum AFB testing. Trained staff ensure proper sputum collection under hygienic conditions.

How Long Does It Take to Get a Sputum AFB Test Report?

Reports are typically available within 6 hours after the sample reaches the laboratory.
Note: Time may vary slightly based on location.

Where Can I See or Get My Sputum AFB Test Results?

You can access your results through the Metropolis Healthcare app or website, or receive them via email/WhatsApp. Printed copies can also be collected from your nearest Metropolis Lab.

Interpreting Sputum AFB Test Results

What Your Sputum AFB Test Results May Indicate

Understanding Abnormal Sputum AFB Test Results by Parameter

How Should You Prepare for a Sputum AFB Test?

• No fasting required.
• Provide an early morning sample (typically higher bacterial concentration).
• Avoid eating, drinking, or smoking for at least one hour before collection.
• Rinse your mouth with clean water (do not use mouthwash) before collection.
• Cough deeply to produce sputum from your lungs (not saliva).
• Seal the container tightly after collection to prevent contamination and leakage.

How Is a Sputum AFB Test Done? (Step-by-Step Procedure)

1. Sample Collection: A deep-cough sputum sample is collected in a sterile, leak-proof container.
2. Smear Preparation: A thin smear is prepared on a glass slide and air-dried.
3. Staining: Ziehl-Neelsen stain is applied to highlight acid-fast bacilli.
4. Microscopy: The slide is examined under a microscope for red-stained bacilli.
5. Reporting: Results are graded as per standard AFB smear grading systems used in TB programs.

Conditions That May Affect Sputum AFB Test Accuracy

• Collection of saliva instead of true sputum
• Low bacterial load (early disease, paucibacillary TB, or some immunocompromised states)
• Prior antibiotic or anti-TB treatment before testing

Diseases That a Sputum AFB Test Can Help Detect

• Pulmonary tuberculosis (TB)
• AFB-positive non-tuberculous mycobacterial infections (e.g., Mycobacterium kansasii, M. avium complex)
• Relapse or recurrent TB cases (as part of monitoring)

Sputum AFB Test​ Price in Different Cities

The cost of a Sputum AFB Test​ may vary depending on your location. Here's a table showing the approximate price range for the Sputum AFB Test​ at Metropolis Healthcare in major Indian cities:

The Sputum AFB Test​ cost may vary depending on the city and the specific tests included in the panel. However, Metropolis Healthcare offers competitive Sputum AFB Test​ prices across major cities in India.

References

1. Revised National Tuberculosis Control Programme (RNTCP) Guidelines, 2016
2. Duguid J.P. (2007). Staining Methods, in Mackie & McCartney Practical Medical Microbiology, 14th Ed., Elsevier.
3. Procop G.W., et al. (2017). Koneman’s Color Atlas and Textbook of Diagnostic Microbiology, 7th Ed., Lippincott Williams & Wilkins.