Skip to content

Genomic DNA from Whole Blood – Probe-Based Assay (Qualitative)

Published: August 9, 2026Updated: August 16, 2026

This test checks for the presence of specific genetic material (DNA) in your blood using a probe-based method. It may be used to screen or confirm certain genetic conditions.

Quick summary

["This test helps identify genetic variations that could influence health risks or conditions."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
49447-6
Short code
T gondii DNA # Bld NAA+probe
Synonyms
T gondii DNA # Bld NAA+probe
Category
chemistry
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

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have a family history of genetic disorders, symptoms suggestive of a genetic condition, or if you’re at higher risk for certain inherited conditions. It can also be used to screen for conditions like cystic fibrosis, sickle cell disease, or other genetic markers before birth or in newborns.

How the Test Works

A small blood sample is taken, and the DNA is extracted. A specialized probe detects specific sequences of DNA in your sample. This method is highly sensitive and can identify genetic material even in small amounts.

Sample Collection and Preparation

Blood is drawn from a vein, typically in your arm. The sample is processed to isolate DNA, which is then analyzed using the probe-based technique. This process is usually painless and takes about 15–30 minutes.

What to Expect Before the Test

No special preparation is needed for this test. However, inform your healthcare provider about any medications, supplements, or recent illnesses that could affect results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test can help diagnose or confirm genetic conditions, assess risks for inherited diseases, or guide prenatal testing. Early detection can lead to better management and treatment options. Results may also influence decisions about genetic counseling or family planning.

Short name

DNA Test (Qualitative)

Frequently asked questions

What Does a Positive Result Mean?
A positive result indicates the presence of the specific genetic material detected by the probe. This may confirm a suspected genetic condition or identify a higher risk for certain health issues. Your healthcare provider will discuss the implications with you based on the specific genetic markers found.
What Does a Negative Result Mean?
A negative result means the probe did not detect the specific genetic sequences tested for in this sample. However, it’s important to note that some genetic conditions may not be detected by this single test. Further testing or follow-up may be recommended if symptoms or risk factors persist.
How Often Should This Test Be Repeated?
This test is typically performed once unless there are new symptoms, updated risk factors, or additional clinical indications. Repeat testing may be needed for monitoring certain genetic conditions over time, but this depends on your healthcare provider’s recommendations.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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