Understanding CBNAAT Test Procedure and Details
Learn about the CBNAAT test procedure, who should get tested, and its benefits over traditional methods. Understand how the test is done, what steps to take if your result is positive, and practical tips for managing tuberculosis effectively.
Written by Dr. Rohinipriyanka Pondugula
Reviewed by Dr. D Bhanu Prakash MBBS, AFIH, Advanced certificate in critical care medicine, Fellowship in critical care medicine
Last updated on 14th Aug, 2025
Introduction
If you or a loved one has been advised to take a CBNAAT test, you might have questions about what it is, why it’s needed, and how it works. This article will explain everything in simple terms so you can feel informed and at ease.
What is a CBNAAT Test?
CBNAAT stands for Cartridge-Based Nucleic Acid Amplification Test. It is a highly advanced and accurate test used mainly to detect tuberculosis (TB) and other infections caused by bacteria or viruses. Unlike traditional tests that take days or weeks, CBNAAT provides fast and reliable results, often within two hours.
Consult a Pulmonologist for the best advice
Why is CBNAAT Important?
TB is a serious infectious disease that primarily affects the lungs but can also spread to other body parts. Early detection is crucial for effective treatment and preventing the spread of infection. The CBNAAT test is especially useful because:
It detects TB bacteria (Mycobacterium tuberculosis) quickly.
- It can identify drug-resistant TB strains, helping doctors choose the right treatment.
- It is highly sensitive, meaning it can detect TB even in small amounts.
How is the CBNAAT Test Done?
The procedure is simple and painless. Here’s what you can expect:
1. Sample Collection
- A healthcare professional will collect a sputum (mucus from your lungs) sample. You may be asked to cough deeply to produce sputum.
- In some cases, other samples like cerebrospinal fluid (for brain TB) or lymph node tissue may be taken.
2. Processing the Sample
- The sample is placed in a cartridge and inserted into a CBNAAT machine.
- The machine amplifies (makes copies of) the genetic material of the bacteria or virus to detect its presence.
3. Getting Results
- Results are usually available within 1-2 hours.
- Your doctor will explain the findings and recommend treatment if needed.
Who Should Get a CBNAAT Test?
You may need this test if:
- You have a persistent cough (more than 2 weeks).
- You experience fever, night sweats, or unexplained weight loss.
- You have been in close contact with a TB patient.
- You have HIV or a weakened immune system, as TB risk is higher.
- You need rapid TB diagnosis before starting treatment.
Benefits of CBNAAT Over Traditional Tests
CBNAAT offers several advantages compared to conventional testing methods, making it a preferred choice for faster and more accurate diagnosis.
What to Do If Your Test is Positive?
A positive result means TB bacteria are present. Don’t panic; TB is treatable and curable. Your doctor will:
- Prescribe antibiotics for 6-9 months.
- Recommend follow-up tests to monitor progress.
- Advise infection control measures (like wearing a mask) to protect others.
- If drug-resistant TB is detected, you may need specialized treatment.
Tips for Managing TB
If diagnosed with TB:
- Take medicines regularly – Skipping doses can make TB harder to treat.
- Eat a nutritious diet – Helps strengthen immunity.
- Avoid smoking and alcohol – These weaken your lungs.
- Cover your mouth when coughing – Prevents spreading TB.
- Complete the full course of treatment – Even if you feel better.
Final Thoughts
The CBNAAT test is a quick, accurate, and reliable way to diagnose TB and other infections. If you have symptoms like a long-lasting cough, fever, or unexplained weight loss, consult a doctor and consider getting tested. Early detection leads to faster recovery and prevents complications.
Remember, TB is treatable, and with proper care, you can regain your health. Stay informed, follow medical advice, and take proactive steps for a healthier life.
Consult a Pulmonologist for the best advice
Consult a Pulmonologist for the best advice
Dr Rohit Sureka
Gastroenterology/gi Medicine Specialist
15 Years • MBBS, DNB General Medicine, DNB Gastroenterology
Jaipur
Apollo 247 virtual - Rajasthan, Jaipur
Dr. Umakanth Eskala
Gastroenterology/gi Medicine Specialist
16 Years • DM (GASTRO)
Visakhapatnam
Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam
Dr Harish K C
Gastroenterology/gi Medicine Specialist
15 Years • MBBS MD DM MRCP(UK) (SCE-Gastroenterology and Hepatology)
Bangalore
Manipal Hospital, Bangalore
Dr. Paramesh K N
Gastroenterology/gi Medicine Specialist
16 Years • MBBS, MS ( General Surgery), DNB ( Surgical Gastroenterology)
Hyderabad
Sprint Diagnostics Centre, Hyderabad
Dr. Gorantla Sarath Chandra
Gastroenterology/gi Medicine Specialist
15 Years • MD, DM (Gastro)
Hyderabad
Star Hospital, Financial District, Hyderabad
(225+ Patients)
Consult a Pulmonologist for the best advice
Dr Rohit Sureka
Gastroenterology/gi Medicine Specialist
15 Years • MBBS, DNB General Medicine, DNB Gastroenterology
Jaipur
Apollo 247 virtual - Rajasthan, Jaipur
Dr. Umakanth Eskala
Gastroenterology/gi Medicine Specialist
16 Years • DM (GASTRO)
Visakhapatnam
Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam
Dr Harish K C
Gastroenterology/gi Medicine Specialist
15 Years • MBBS MD DM MRCP(UK) (SCE-Gastroenterology and Hepatology)
Bangalore
Manipal Hospital, Bangalore
Dr. Paramesh K N
Gastroenterology/gi Medicine Specialist
16 Years • MBBS, MS ( General Surgery), DNB ( Surgical Gastroenterology)
Hyderabad
Sprint Diagnostics Centre, Hyderabad
Dr. Gorantla Sarath Chandra
Gastroenterology/gi Medicine Specialist
15 Years • MD, DM (Gastro)
Hyderabad
Star Hospital, Financial District, Hyderabad
(225+ Patients)
