Cultured AFB Antitubercular DST Ethionamide Test
Short Name: AFB DST Ethionamide Test
Also known as: Ethionamide Susceptibility Test, AFB DST Ethionamide, TB Drug Susceptibility Test Ethionamide
Cultured AFB Antitubercular DST Ethionamide Test test available at DNA Labs India for ₹4,000. Uses Automated Fluorescent on Pure growth of Mycobacterium tuberculosis complex on appropriate media samples. Results in Results are available within 21 days of sample receipt.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Kothari Ramesh Shantilal
Consultant Microbiologist · Reg: 27670
Last reviewed: September 7, 2026
Overview
To diagnose tuberculosis and evaluate the susceptibility of Mycobacterium tuberculosis to ethionamide, guiding targeted antibiotic therapy for drug-resistant TB.
- Test Code
- 434
- Price
- ₹4,000
- Sample Type
- Pure growth of Mycobacterium tuberculosis complex on appropriate media
- Result Time
- Results are available within 21 days of sample receipt.
- Fasting Required
- No
- Method
- Automated Fluorescent
Sample Collection
No special preparation is required. Ensure the sample is collected under sterile conditions and transported promptly to the laboratory.
Method: Laboratory culture or direct specimen submission
Laboratory Analysis
For specimen submission, collect sputum or other relevant samples as directed by the healthcare provider. If using laboratory culture, the pure growth will be processed from already submitted specimens.
Report Delivery
Store the sample as recommended: at room temperature for up to 48 hours or refrigerated for up to 4 weeks. Avoid freezing.
Timeline: Results are available within 21 days of sample receipt.
Patient Instructions
About This Test
Who Should Get This Test
To diagnose tuberculosis and evaluate the susceptibility of Mycobacterium tuberculosis to ethionamide, guiding targeted antibiotic therapy for drug-resistant TB.
How to Prepare
- Submit pure growth of Mycobacterium tuberculosis complex on appropriate media in a sterile screw capped container.
- Place the container in a sealed plastic bag for safe transport.
- Ship refrigerated unless processed from specimens already submitted to the laboratory.
- Follow all standard biosafety protocols for handling TB specimens.
Doctor's Notes
Reviewed by Dr Kothari Ramesh Shantilal — MBBS, MD (Microbiology) · Reg. No. 27670
"This test is essential for identifying ethionamide resistance in tuberculosis, guiding personalized treatment to improve outcomes and prevent drug resistance."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Contaminated or improperly labeled samples
- Samples not stored or transported according to instructions
- Insufficient sample volume or inadequate bacterial growth
- Specimens received without proper documentation
Understanding Your Results
Susceptible
Ethionamide can be considered as part of the treatment regimen for tuberculosis.
Resistant
Ethionamide is unlikely to be effective; consult a healthcare provider for alternative drug options.
Inconclusive
Test may need repetition due to technical issues or sample quality; consult with the laboratory.
Consult a doctor if you experience symptoms of tuberculosis such as persistent cough, chest pain, or weight loss, or if your test results indicate resistance to ethionamide for personalized treatment planning.
Limitations
- ⚠Test requires bacterial culture, which can take several weeks
- ⚠Limited to detecting susceptibility only to ethionamide, not other drugs
- ⚠May not detect all resistant strains due to phenotypic variability
- ⚠Results depend on the quality of the submitted sample
Risks & Considerations
- ●No direct physical risks from the test itself
- ●Potential delay in treatment if results are delayed
- ●Risk of misinterpretation if not reviewed by a specialist
Interfering Factors
- ●Contamination of the sample during collection or transport
- ●Improper storage conditions affecting bacterial viability
- ●Use of antibiotics prior to sample collection may inhibit growth
- ●Technical errors in culture or susceptibility testing procedures
Compare With Similar Tests
| Test | Cultured AFB Antitubercular DST Ethionamide Test | AFB Smear Microscopy | TB PCR Test | Xpert MTB/RIF Test | Full AFB Culture and Sensitivity | Line Probe Assays |
|---|---|---|---|---|---|---|
| Comparison | Cultured AFB Antitubercular DST Ethionamide Test |
Frequently Asked Questions
What is the Cultured AFB Antitubercular DST Ethionamide Test?
Why is this test performed?
How is the sample collected for this test?
What does a positive result mean?
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What is the difference between this test and a sputum test?
Can this test detect all types of TB?
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