NTM MOTT Slow Grower Antibiogram Test
About NTM MOTT Slow Grower Antibiogram Test
| Field | Value |
|---|---|
| Also Known As | AFB Antibiogram for MOTT (Slow Growers) Test, NTM Drug Susceptibility Testing (Slow Growers), MOTT Antibiogram for Slow Growers Test, AFB-MOTT Drug Sensitivity Panel (Slow Growers) |
| Sample Type | Sputum, bronchial wash, wound swab, or tissue biopsy |
| Fasting Required | No fasting required |
| Report Time | 2 to 6 weeks |
| Recommended For | All genders, adults; particularly those with confirmed or suspected NTM infection or not responding to initial therapy |
| Price | Starting at ₹7,500 |
What Is a NTM MOTT Slow Grower Antibiogram Test?
The NTM MOTT slow grower antibiogram test identifies which antibiotics can effectively treat infections caused by slow-growing nontuberculous mycobacteria (NTM), also called 'Mycobacteria Other Than Tuberculosis' (MOTT). The test measures the minimum inhibitory concentration (MIC), which is the lowest antibiotic dose needed to stop bacterial growth. It is typically ordered for patients with a confirmed NTM infection who need a targeted treatment plan. This test is also known as an AFB antibiogram for MOTT (slow growers) test, NTM drug susceptibility testing (slow growers), MOTT antibiogram for slow growers test, or AFB-MOTT drug sensitivity panel (slow growers). This test uses a sputum, bronchial wash, wound swab, or tissue biopsy sample.
What Does a NTM MOTT Slow Grower Antibiogram Test Measure?
The NTM MOTT slow grower antibiogram test determines the minimum inhibitory concentration (MIC), the lowest antibiotic concentration that stops the bacteria from growing. This helps doctors select the most effective drugs for treatment. Here is what it tells us:
| Parameter | What It Tells You |
|---|---|
| Slow-growing NTM/MOTT | Measures the antibiotic susceptibility profile of the identified slow-growing nontuberculous mycobacterial isolate against tested antimicrobial agents. |
Why Is a NTM MOTT Slow Grower Antibiogram Test Done?
This is a specialised test ordered when slow-growing mycobacteria are isolated and a doctor needs to know which antibiotics will work best.
Common Symptoms That May Require This Test
A doctor may request the AFB antibiogram for MOTT (slow growers) test when a patient presents with one or more of the following symptoms:
- Chronic or recurring cough lasting several weeks
- Production of sputum (mucus coughed up from the lungs)
- Unexplained fatigue or general malaise
- Shortness of breath (dyspnoea)
- Persistent low-grade fever
- Haemoptysis (coughing up blood)
- Unintended weight loss or chest pain
Conditions This Test Can Help Detect
The NTM MOTT slow grower antibiogram test helps guide treatment for infections caused by several slow-growing mycobacterial species. These include:
- Pulmonary infections caused by M. avium complex (MAC), M. kansasii, M. xenopi, M. malmoense, and M. szulgai
- Skin and soft tissue infections, musculoskeletal infections, and lymphadenitis (swollen lymph nodes)
- Disseminated NTM disease in immunocompromised individuals
- Atypical tuberculosis caused by MOTT organisms
- Lung disease associated with pre-existing conditions such as bronchiectasis or COPD
NTM MOTT Slow Grower Antibiogram Test for Chronic Disease Monitoring
The NTM drug susceptibility testing (slow growers) plays an important role in long-term treatment management. If a patient remains culture-positive after three months of treatment, susceptibility testing is repeated and the antibiotic regimen is adjusted based on updated MIC results. A follow-up culture at six months helps confirm whether the treatment is working, and an NTM specialist may be consulted if the patient continues to test positive.
How to Prepare and What to Expect
Collecting the right sample in the right way is critical for the AFB-MOTT drug sensitivity panel (slow growers). Here is what you need to know before your appointment.
Do You Need to Fast?
No, fasting is not required for this test. You can eat and drink normally before sample collection. Always follow specific instructions given by your doctor.
Practical Tips Before Your Test
- Rinse your mouth with plain water (not mouthwash) before collecting sputum, to reduce contamination from oral secretions
- Collect early-morning sputum if possible, as this tends to yield better results
- At least two sputum samples collected on different days are recommended for suspected pulmonary NTM disease
- Refrigerate the sputum sample immediately if it cannot be sent to the lab straight away
- Inform your doctor about any antibiotics you are currently taking or have recently completed
- Avoid contaminating the container with nasal secretions or saliva
Step-by-Step Procedure
The collection process differs depending on the sample type. Here is what to expect:
- For sputum: take a deep breath, cough forcefully from the chest, and collect at least 5 to 10 ml of sputum into the sterile, leak-proof container provided.
- Seal the container securely and label it with your name, date, and time of collection.
- For bronchial wash or tissue biopsy: these samples are collected by a healthcare professional at a hospital during a bronchoscopy or a minor surgical procedure.
- The sample is transported to the laboratory under appropriate temperature conditions to preserve its integrity.
- In the laboratory, a pure culture of the NTM organism is grown; this step alone takes several weeks due to the slow growth of these bacteria.
- Once the culture is ready, the microbroth dilution method is used to determine the MIC for each antibiotic in the panel, and results are reported.
Factors That Can Affect Accuracy
Several factors can influence the reliability of your results:
- Insufficient sample volume or poor sample quality
- Contamination of the specimen with saliva or oral secretions
- A sample inoculum that is too heavy or too light, leading to falsely resistant or falsely susceptible readings
- Prior use of antibiotics before sample collection
- Delay between collection and laboratory processing
- Failure to identify the NTM to species level before testing
Understanding Your NTM MOTT Slow Grower Antibiogram Test Results
Your results should always be reviewed alongside your doctor, who will use them to decide the most appropriate course of care. Unlike routine blood tests, this test does not have conventional "normal" ranges. Instead, each antibiotic tested is assigned one of three interpretive categories:
| Result | Interpretation |
|---|---|
| Susceptible (S) | The antibiotic can effectively inhibit bacterial growth at standard doses |
| Intermediate (I) | The antibiotic may be effective at higher doses or at specific body sites |
| Resistant (R) | The bacteria are not inhibited by the antibiotic at achievable concentrations |
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 health conditions can affect how NTM infections present and how susceptibility results should be read:
- People living with HIV or AIDS have a higher risk of NTM infection due to reduced immune function, and susceptibility patterns may differ from those seen in otherwise healthy individuals.
- Pre-existing lung conditions such as bronchiectasis, cystic fibrosis, prior pulmonary tuberculosis, and COPD are strongly associated with NTM infections and may affect disease severity.
- Patients on immunosuppressive therapy (such as post-transplant medications or chemotherapy) may also show altered susceptibility profiles.
- Prior use of macrolide antibiotics as a single agent can lead to macrolide resistance in certain NTM species.
How to Maintain Healthy Levels
While NTM infections require medical management, some general steps can help support respiratory and immune health:
- Reduce exposure to known environmental sources of NTM, including hot tubs, showerheads, and potting soil
- Practise good respiratory hygiene, including regular handwashing and avoiding shared utensils when unwell
- Support immune function through a balanced diet, adequate sleep, and keeping chronic conditions such as diabetes or COPD well managed under medical supervision
Lupin Diagnostics NTM MOTT Slow Grower Antibiogram Test Price and Home Collection
The NTM MOTT slow grower antibiogram test price starts at approximately ₹7,500 at Lupin Diagnostics. Home collection is available for sputum samples; other sample types require a visit to the hospital. The table below shows approximate prices:
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹7,500 |
| Kolkata | ₹7,500 |
| Bangalore | ₹7,500 |
| Hyderabad | ₹7,500 |
| Pune | ₹7,500 |
| Chennai | ₹7,500 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Follow these steps to book your MOTT antibiogram for slow growers test:
- Select the test on the Lupin Diagnostics website.
- Choose your city and preferred time slot.
- Opt for home sample collection by a certified phlebotomist (for sputum). For bronchial wash, wound swab, or tissue biopsy collection, please visit your hospital as directed by your doctor.
- Receive your report via email or WhatsApp within the stipulated turnaround time.
Home Collection
Home collection is available for sputum samples across cities where Lupin Diagnostics operates. All samples are processed in NABL-accredited laboratories by trained technologists. Digital reports are delivered via email or WhatsApp once ready.
For bronchial wash, wound swab, or tissue biopsy collection, please visit your hospital as directed by your doctor.
Frequently Asked Questions
Rapid-growing mycobacteria produce visible colonies on culture plates in under seven days. Slow-growing NTM take more than seven days to form mature colonies. This distinction matters because the two groups are tested against different antibiotic panels, and the NTM MOTT slow grower antibiogram test specifically targets the slow-growing category.
Treatment outcomes vary by species. M. kansasii infections generally have the most predictable and successful treatment outcomes among slow-growing NTM. M. avium complex infections require longer treatment courses that can be demanding. Your doctor will use the antibiogram results, alongside your overall health status, to plan the most suitable approach.
Home collection is available for sputum samples only. If your doctor has requested a bronchial wash, wound swab, or tissue biopsy, these samples must be collected at a hospital or laboratory by a trained healthcare professional.
People at higher risk include older adults, those with bronchiectasis or COPD, and immunocompromised individuals such as those living with HIV/AIDS, organ transplant recipients, or patients on immunosuppressive therapy. Exposure to environmental sources such as hot tubs or certain soils may also increase risk.
The results tell the treating doctor which antibiotics are likely to work against the specific NTM strain identified. This helps avoid ineffective treatments and allows the doctor to build a targeted antibiotic regimen. Results are particularly useful when a patient is not responding to initial therapy.
Yes. If a patient remains culture-positive after three months of treatment, susceptibility testing is recommended again. Updated MIC results help the doctor decide whether to continue, modify, or switch the antibiotic regimen for better outcomes.
NTM MOTT Slow Grower Antibiogram Test: Booking, Price, and Results
