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Streptococcus DNA Detection by Nucleic Acid Amplification Probe (Qualitative)

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

This test checks for genetic material from certain bacteria called *Streptococcus* that may cause infections like strep throat or skin infections. It helps determine if bacteria are present in your sample.

Quick summary

["A quick way to identify possible bacterial infections caused by Streptococcus without waiting for lab culture results."]

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

Key facts at a glance

LOINC
92774-9
Short code
Streptococcus DNA Bld Pos Ql NAA+probe
Synonyms
Streptococcus DNA Bld Pos Ql NAA+probe
Category
coagulation
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Ref low
0.8
Ref high
1.2
Critical range
— – 5 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
CPT
85610
SNOMED
396252006
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 Is Done

Your healthcare provider may order this test if you have symptoms like sore throat, fever, or skin sores that could be caused by *Streptococcus* bacteria. It’s also used in certain settings, like newborns or people with weakened immune systems, to check for infection early.

How the Test Works

The test uses a special probe to detect DNA from *Streptococcus* bacteria in your sample. If bacteria are present, the probe binds to their genetic material, confirming infection. Results are typically ready within hours.

Sample Collection

The sample is usually taken from a throat swab (for throat infections) or skin lesion (for skin infections). Rarely, blood or other fluids may be used, depending on the clinical situation.

What to Expect Before the Test

No special preparation is needed. If you’re having throat symptoms, avoid eating or drinking for 30 minutes before the test. If you’re unsure, ask your provider about timing.

Reference range

INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A

Specimen: whole-blood

Inform your healthcare provider if you are taking blood thinners. No special preparation required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Strep DNA Test (Qualitative)

Frequently asked questions

What does a positive result mean?
A positive result strongly suggests an active *Streptococcus* infection, which may require treatment with antibiotics. Your provider will discuss next steps, like starting medication or further testing.
Can this test be used for all types of *Streptococcus* infections?
This test detects *Streptococcus* DNA broadly, but it may not distinguish between different strains (e.g., Group A vs. Group B). Your provider will consider the clinical context to guide care.
How long does it take to get results?
Results are usually available within 2–4 hours, depending on lab processing. Your provider will contact you once they’re ready, so check with them about follow-up.
  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