MTB Susceptibility – Rifampicin Test: Booking, Price, and Results
About MTB Susceptibility – Rifampicin Test: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | Xpert MTB/RIF Test, GeneXpert TB Test, CBNAAT, TB Rifampicin Resistance Test, MTB-RIF PCR |
| Sample Type | Ascitic fluid, aspirate, BAL, bile, bone marrow, bronchial fluid, sputum, urine, pus, swabs, tissue, CSF and other body fluids |
| Fasting Required | No |
| Report Time | 29 days |
| Recommended For | Males and females, all age groups |
| Price | Starting at ₹2,200 |
What Is an MTB Susceptibility – Rifampicin Test?
The MTB Susceptibility – Rifampicin test is a molecular diagnostic test that detects the presence of Mycobacterium tuberculosis (the bacteria that causes tuberculosis) and checks whether the bacteria resist rifampicin, a key TB drug. It is also known as the Xpert MTB/RIF test, GeneXpert TB test or CBNAAT. Doctors prescribe this test when they suspect active tuberculosis, particularly in cases where drug-resistant TB is a concern. The test accepts a wide range of sample types, including sputum, urine, CSF, pus and tissue, depending on the site of suspected infection.
What Does an MTB Susceptibility – Rifampicin Test Measure?
The MTB Susceptibility – Rifampicin test procedure analyses a sample for two specific findings. Here is what each component means:
| Component | What It Checks |
|---|---|
| Mycobacterium tuberculosis (MTB) DNA | Looks for the genetic material of the bacteria that cause TB, confirming whether an active TB infection is present |
| Rifampicin resistance | Scans for mutations in the rpoB gene, which are linked to resistance against rifampicin; more than 95% of rifampicin-resistant TB strains carry mutations in a specific region of this gene |
Rifampicin resistance is clinically significant because it is strongly linked to multidrug-resistant TB (MDR-TB), where the bacteria resist more than one antibiotic.
Why Is an MTB Susceptibility – Rifampicin Test Done?
Doctors order the MTB Susceptibility – Rifampicin test to confirm TB and guide treatment decisions, particularly when drug resistance is suspected. The test plays a key role in identifying whether standard first-line treatment will work.
Common Symptoms That May Require This Test
A doctor may recommend this test when a patient presents with the following symptoms:
- Persistent cough lasting more than three weeks
- Coughing up blood or mucus
- Chest pain or pain when breathing and coughing
- Night sweats
- Unexplained weight loss
- Poor appetite
- Unexplained fever or fatigue
Conditions This Test Can Help Detect
The test helps identify several TB-related conditions, including:
- Active pulmonary tuberculosis (TB affecting the lungs)
- Extrapulmonary tuberculosis (TB in organs other than the lungs)
- Rifampicin-resistant TB, which is often an indicator of multidrug-resistant TB (MDR-TB)
- Primary drug-resistant TB, where resistance is present from the start of infection
How to Prepare and What to Expect
No special preparation is required before the MTB Susceptibility – Rifampicin test. However, following a few simple steps will help ensure an accurate result.
Do You Need to Fast?
No fasting is required before this test. You may eat and drink normally. However, if a sputum sample is being collected, rinse your mouth thoroughly with plain water before collecting the sample. Do not use mouthwash, as it may affect the result.
Practical Tips Before Your Test
Keep the following in mind before sample collection:
- Bring a detailed clinical history including your symptoms, previous test results and relevant medical records, as this is required for the test.
- Provide your complete address and a working mobile number at the time of booking.
- If collecting sputum, do so first thing in the morning, before eating or drinking anything.
- Rinse your mouth vigorously with plain water and spit it out before collecting the sputum.
- Cough deeply from the lungs; the sample should be thick and sticky, not thin and watery like saliva.
- If possible, collect sputum outdoors or near an open window to protect others from airborne TB germs.
- Inform your doctor about any anti-TB medications you are currently taking, as these can affect the accuracy of the test.
- Wear comfortable clothing with easy access to your arm if a blood draw or fluid sample is needed for extrapulmonary TB investigation.
Step-by-Step Procedure
The collection process varies depending on the sample type. Here is what the process involves:
- Your doctor identifies the most appropriate sample type based on your clinical condition. This may be sputum, bronchial lavage (BAL) fluid, urine, pus or tissue.
- The sample is collected using the appropriate method, such as deep coughing for sputum or a clinical procedure for other body fluids or tissues.
- The collected sample is placed in a sterile container and stored at 2 to 8 degrees Celsius for safe transport to the laboratory.
- The sealed sample is sent to the laboratory, where it is loaded into the GeneXpert machine. The automated system extracts DNA and runs PCR amplification.
- The report is prepared and delivered digitally within 29 days.
Factors That Can Affect Accuracy
Certain factors can influence the reliability of your result. These include:
- Poor sputum quality (saliva instead of deep-lung secretions)
- Starting anti-TB medications before collecting the sample
- Improper storage or delayed transport of the sample
- Presence of substances in the sample that interfere with DNA detection
Understanding Your MTB Susceptibility – Rifampicin Test Results
Your results will indicate whether TB bacteria were detected and whether they are resistant to rifampicin. The results should always be reviewed with a qualified doctor who can consider your full medical history. The table below shows the general interpretation of possible outcomes.
| Result | Interpretation |
|---|---|
| MTB Not Detected / Rifampicin Resistance Not Detected | No evidence of TB bacteria in the sample; rifampicin resistance absent |
| MTB Detected / Rifampicin Susceptible | Active TB infection present; bacteria likely to respond to standard rifampicin-based treatment |
| MTB Detected / Rifampicin Resistant | TB bacteria present and resistant to rifampicin; may indicate MDR-TB requiring specialist care |
These ranges are general guidelines. Your doctor will interpret your results based on your age, health history and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
Certain situations can affect how results are interpreted:
- In patients strongly suspected of having MDR-TB despite a negative result, a follow-up culture-based drug susceptibility test may be needed to detect resistance outside the region checked by this test.
- HIV co-infection can affect TB presentation and may require a different testing strategy.
- This test cannot reliably be performed if the patient has already been on anti-TB therapy for three days or more, as treatment may interfere with detection.
How to Maintain Healthy Levels
These are general wellness tips, not treatment recommendations:
- Complete the full prescribed course of TB treatment without interruption to prevent drug resistance from developing.
- Ensure good ventilation in your home and living spaces to reduce the risk of TB transmission.
- Seek medical attention promptly if you experience a persistent cough, unexplained weight loss, night sweats or prolonged fever.
Lupin Diagnostics MTB Susceptibility – Rifampicin Test Price
The MTB Susceptibility – Rifampicin test cost starts at ₹2,200 at Lupin Diagnostics. This test requires a visit to a Lupin Diagnostics centre; home collection is not available for this test.
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 2200 |
| CHENNAI | 2200 |
| HYDERABAD | 2200 |
| KOLKATA | 2200 |
| NAVI MUMBAI | 2200 |
| PUNE | 2200 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Follow these steps for MTB Susceptibility – Rifampicin test online booking:
- Select the test on the Lupin Diagnostics website.
- Choose your city and preferred centre location.
- Visit the centre at your scheduled time for sample collection.
- Receive your report via email or WhatsApp within the stipulated turnaround time.
Frequently Asked Questions
This test detects the presence of Mycobacterium tuberculosis bacteria in a sample and checks whether those bacteria are resistant to rifampicin, a key TB drug. It helps doctors confirm active TB and decide whether standard or alternative treatment is needed.
The MTB Susceptibility – Rifampicin test report is delivered within 29 days. This is because the test may involve additional susceptibility analysis beyond initial detection, which requires additional laboratory processing time.
Rifampicin resistance is closely associated with multidrug-resistant TB (MDR-TB), a form of TB that does not respond to two of the most effective first-line TB drugs. Detecting resistance early allows doctors to start the right treatment without delay.
The test accepts a wide range of samples depending on the suspected site of infection. These include sputum, urine, CSF, pus, pleural fluid, tissue and several other body fluids. A healthcare professional will advise which sample is appropriate for your situation.
No fasting is required. However, if a sputum sample is being collected, rinse your mouth with plain water before collection and avoid eating or drinking anything immediately before producing the sample.
No. The MTB Susceptibility – Rifampicin test is a diagnostic test and is not designed to monitor treatment progress. DNA from bacteria can remain detectable in samples even after successful treatment, making it unsuitable for tracking treatment response.
You should bring a detailed clinical history, including your symptoms, previous test results and any relevant medical records. You will also need to provide your complete address and a working mobile number at the time of booking or sample collection.
Coverage depends on your individual insurance plan and provider. It is advisable to check with your insurance company before booking the test to confirm whether it is included under your policy.
MTB Susceptibility – Rifampicin Test: Booking, Price, and Results
