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Methicillin-Resistant Staphylococcus aureus (MRSA) Detection Test

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

A laboratory test that checks a specimen for methicillin-resistant Staphylococcus aureus, a bacterium resistant to methicillin and related antibiotics.

Quick summary

["A positive result means MRSA was detected, but it does not by itself show that you have an active infection."]

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

Key facts at a glance

LOINC
36246-7
Short code
MR Sacrum W contr IV
Synonyms
MR Sacrum W contr IV
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mr
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 is this test?

This test looks for MRSA in a laboratory specimen. MRSA is a type of Staphylococcus bacterium that is resistant to methicillin and commonly used to treat these infections.

Why might I need this test?

MRSA testing may be ordered to evaluate suspected infection, especially after surgery, hospitalization, or contact with a healthcare setting. It may also be used during screening or outbreak control to help guide infection-control measures.

How is the test performed?

A clinician or healthcare worker collects a specimen from the location being evaluated. The laboratory uses a culture or another approved method to determine whether MRSA is present, and the report identifies the specimen and method used.

How do I prepare for the test?

No special preparation is usually needed. Follow the collection instructions provided by your healthcare professional, particularly if you are being asked to collect the specimen yourself.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

MRSA test

Frequently asked questions

Does a positive MRSA result mean I have an MRSA infection?
Not necessarily. MRSA can be present on the skin or in the nose without causing illness, so your clinician will interpret the result along with your symptoms and the specimen source.
What happens if MRSA is detected?
Your healthcare team may recommend infection-control precautions and, if an infection is present, choose an antibiotic that is expected to be effective. Treatment decisions should not be based on this result alone.
Can I get tested for MRSA at home?
MRSA testing generally requires a properly collected laboratory specimen. Ask your clinician which specimen is needed and whether screening is appropriate for your situation.
  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