Microbiological Detection of *Methicillin-Resistant Staphylococcus aureus* (MRSA) DNA via Nucleic Acid Amplification Probe
This test checks for genetic material from MRSA, a type of staph bacteria that can cause infections and is often resistant to common antibiotics.
["Helps identify potential MRSA infection risk in wounds, surgical sites, or respiratory samples."]
Key facts at a glance
- LOINC
- 103189-7
- Short code
- M. abscessus DNA Wnd Ql NAA+probe
- Synonyms
- M. abscessus DNA Wnd Ql NAA+probe
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- probe-amp-tar
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What This Test Measures
The test detects the presence of specific DNA sequences linked to MRSA, using a molecular probe to confirm infection at a genetic level. This is not a direct culture test but relies on identifying bacterial genetic material in a sample.
Why It’s Done
Your healthcare provider may order this test if you have signs of infection (such as redness, swelling, or drainage from a wound) or if you’re at higher risk for MRSA (e.g., recent surgery, hospital stay, or immune suppression). It’s also used in screening for healthcare-associated infections.
Sample Collection and Process
A swab or other sample (e.g., from a wound, nasal passage, or sputum) is collected and sent to the lab. The DNA in the sample is extracted and analyzed using a probe that binds only to MRSA DNA, triggering a detectable signal if MRSA is present.
What the Results Mean
A positive result indicates the presence of MRSA DNA, suggesting a possible infection. A negative result means no MRSA DNA was detected in the sample, but infection could still be present from other bacteria. Results guide treatment decisions, such as prescribing different antibiotics.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
MRSA is a serious concern because it resists many antibiotics, making infections harder to treat. Early detection helps prevent spread in healthcare settings and allows for targeted antibiotic use to control infections. This test is particularly useful for rapid screening in high-risk patients or areas with known MRSA outbreaks.
Short name
MRSA DNA Probe Test
Frequently asked questions
How long does it take to get results?
Can this test confirm a current infection?
What if the test is positive but I don’t have symptoms?
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