Genomic DNA from Blood (Qualitative Probe-Based Detection for Specific Pathogen)
This test checks for the presence of specific genetic material (DNA) from a targeted pathogen in your blood using a molecular probe. It helps identify infections at the genetic level, often used in research or specialized diagnostic settings.
["This test detects genetic material from certain pathogens in your blood, aiding in early or specialized diagnosis."]
Key facts at a glance
- LOINC
- 92773-1
- Short code
- Gp B Strep DNA Bld Pos Ql NAA+probe
- Synonyms
- Gp B Strep DNA Bld Pos Ql NAA+probe
- Category
- coagulation
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- probe-amp-tar
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
The test analyzes a sample of your blood for the presence of a specific pathogen’s DNA. Unlike traditional tests that detect proteins or antibodies, this method directly examines genetic material. This approach can be highly sensitive and may detect infections before symptoms appear or when other tests are inconclusive.
How the Test Works
A small amount of your blood is collected and processed to extract DNA. Specialized probes bind to the pathogen’s DNA if present, allowing for detection through fluorescence or another molecular signal. This technique is often used for pathogens that are difficult to culture or where early detection is critical.
Why It Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms suggestive of a specific infection (e.g., persistent fever, unusual lab abnormalities), if you’re at high risk for certain infections, or if standard tests are negative but clinical suspicion remains high. It may also be used in research or specialized clinical settings.
What to Expect Before the Test
No special preparation is typically required. You may have a small needle inserted into a vein (usually in your arm) to draw blood. If you’re nervous, let your healthcare provider know—they can offer comfort measures.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test provides a direct molecular confirmation of certain infections, which can be crucial for diagnosing conditions like certain viral or bacterial infections where traditional tests may be less reliable. Early detection can guide treatment decisions, such as starting targeted antibiotics or antiviral therapy sooner. However, results should always be interpreted by a healthcare professional in the context of your symptoms and medical history.
Frequently asked questions
How long will it take to get my results?
What if the test is positive?
Can I eat or drink before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy