Cultured AFB Antitubercular DST Streptomycin Test
Short Name: AFB DST Streptomycin
Also known as: AFB Culture and Sensitivity Streptomycin, Tuberculosis Drug Susceptibility Test Streptomycin
Cultured AFB Antitubercular DST Streptomycin 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 typically available within 21 days of sample receipt.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr Pasupathy Arumugam
Consultant Pathologist · Reg: 21521
Last reviewed: September 7, 2026
Overview
The purpose of this test is to confirm the presence of Mycobacterium tuberculosis through culture and to evaluate its susceptibility to streptomycin, aiding in targeted antibiotic therapy for tuberculosis.
- Test Code
- 452
- Price
- ₹4,000
- Sample Type
- Pure growth of Mycobacterium tuberculosis complex on appropriate media
- Result Time
- Results are typically available within 21 days of sample receipt.
- Fasting Required
- No
- Method
- Automated Fluorescent
Sample Collection
No special preparation required.
Method: Culture from sputum or other clinical specimens
Laboratory Analysis
Collect sputum or other specimens as directed by a healthcare provider. Ensure the sample is placed in a sterile screw-capped container and sealed in a plastic bag.
Report Delivery
Ship the sample refrigerated. If part of a culture series, the lab will process pure growth from submitted specimens.
Timeline: Results are typically available within 21 days of sample receipt.
Patient Instructions
About This Test
Who Should Get This Test
The purpose of this test is to confirm the presence of Mycobacterium tuberculosis through culture and to evaluate its susceptibility to streptomycin, aiding in targeted antibiotic therapy for tuberculosis.
How to Prepare
- Use a sterile container provided by the lab.
- For sputum, collect early morning sample after deep coughing.
- Label the container with patient details and date.
- Refrigerate if not shipping immediately.
- Follow lab-specific guidelines for specimen transport.
Doctor's Notes
Reviewed by Dr Pasupathy Arumugam — MBBS, MD (Pathology) · Reg. No. 21521
"This test is essential for guiding tuberculosis treatment, especially in regions with high drug resistance. Accurate susceptibility results help tailor antibiotic therapy and prevent treatment failure."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Contaminated or leaking containers
- Incorrect sample type or insufficient volume
- Unlabeled or mislabeled specimens
- Specimens stored improperly beyond stability limits
Understanding Your Results
Positive for M. tuberculosis growth
Confirms active tuberculosis infection.
Negative for growth
No TB bacteria detected; clinical correlation needed.
Streptomycin Sensitive
Bacteria are likely to respond to streptomycin treatment.
Streptomycin Resistant
Bacteria may not respond to streptomycin; alternative antibiotics required.
Consult a doctor if you experience symptoms like persistent cough, chest pain, or unexplained weight loss, or if the test results indicate positive growth or resistance to streptomycin.
Limitations
- ⚠Results take up to 21 days due to culture time
- ⚠Requires pure growth of bacteria, which may not always be achievable
- ⚠Does not detect non-tuberculous mycobacteria unless specified
- ⚠Limited to streptomycin susceptibility; other drugs require separate tests
Risks & Considerations
- ●Minimal risks from sample collection, such as discomfort during sputum expectoration.
- ●False-negative results possible due to low bacterial load or prior treatment.
- ●False positives from contamination, though rare with proper handling.
Interfering Factors
- ●Contamination of the sample during collection or transport
- ●Prior antibiotic use affecting bacterial growth
- ●Improper storage or handling of the specimen
- ●Low bacterial load in the sample
Compare With Similar Tests
| Test | Cultured AFB Antitubercular DST Streptomycin Test | AFB Smear Microscopy | TB PCR Test | Chest X-ray | GeneXpert MTB/RIF |
|---|---|---|---|---|---|
| Comparison | Cultured AFB Antitubercular DST Streptomycin Test |
Frequently Asked Questions
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Reference Laboratory Services
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