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Staphylococcus aureus DNA Detection in Whole Blood by Probe-Based Assay

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

This test checks for genetic material from *Staphylococcus aureus* bacteria in your blood. It helps identify if this type of bacteria is present, which can be important for diagnosing infections.

Quick summary

["This test helps determine if *Staphylococcus aureus* bacteria are in your bloodstream, aiding in infection diagnosis."]

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

Key facts at a glance

LOINC
85765-6
Short code
S aureus DNA Bld Pos Ql NAA+n-prb
Synonyms
S aureus DNA Bld Pos Ql NAA+n-prb
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
non-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 detects the presence of *Staphylococcus aureus* DNA, a genetic marker unique to this type of bacteria. This is done using a specialized probe that binds to specific sequences in the bacterial DNA. If the probe finds matching DNA, it confirms the presence of *Staphylococcus aureus* in your blood sample.

Why It’s Done

Your healthcare provider may order this test if you have symptoms of a blood infection (sepsis), signs of a staph infection, or if you’re at higher risk for *Staphylococcus aureus* infections, such as after surgery or due to weakened immunity.

Sample Collection and Preparation

A blood sample is drawn from a vein, typically in your arm. The sample is processed to extract DNA, which is then tested for *Staphylococcus aureus* genetic material. This test does not require fasting or special preparation.

What to Expect Before the Test

No special preparation is needed. You may experience mild discomfort from the needle, but it usually goes away quickly. If you’re on blood-thinning medication, let your provider know before the test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Staph DNA Blood Test

Frequently asked questions

How long does it take to get results?
Results are typically available within 24 to 48 hours, depending on lab processing times. Your healthcare provider will discuss the results with you during your follow-up visit.
Can I eat or drink before this test?
No special diet is required. You can eat and drink normally before the blood draw, as this test does not involve fasting.
Is this test covered by insurance?
Whether this test is covered by insurance depends on your insurance plan and medical necessity. Check with your insurance provider or ask your healthcare provider for details about coverage before the test.
  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