Fluoroquinolone Antibiotic Resistance Probe (Serum/Plasma)
This test checks for the presence of genetic markers that may indicate resistance to fluoroquinolone antibiotics, commonly used to treat bacterial infections.
["Helps determine if a bacterial infection might not respond to fluoroquinolone antibiotics as expected."]
Key facts at a glance
- LOINC
- 74040-7
- Short code
- FLUAV N2 RNA Ct Spec Qn NAA+probe
- Synonyms
- FLUAV N2 RNA Ct Spec Qn 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
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you have a suspected bacterial infection that doesn’t improve with fluoroquinolone treatment, or if you’re considering this antibiotic for a specific infection. It’s also used in research or clinical settings to monitor antibiotic resistance trends.
What to Expect Before the Test
No special preparation is needed. You’ll provide a blood sample, usually drawn from a vein in your arm. The sample is collected in a tube that separates serum or plasma from blood cells.
What the Test Measures
This test detects specific genetic sequences (probes) in your blood that could signal bacteria resistant to fluoroquinolone antibiotics. It’s not a direct measurement of antibiotic levels in your body but rather an indirect check for resistance mechanisms.
What the Results Mean
Results are qualitative (positive or negative) and indicate whether the genetic markers for fluoroquinolone resistance are present. Positive results suggest potential resistance, but further testing or clinical correlation is needed to guide treatment decisions.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Fluoroquinolone Resistance Screening
Frequently asked questions
Your healthcare provider will use these results alongside clinical findings, culture results, and patient history to decide if alternative antibiotics are needed. Resistance patterns help guide treatment plans to prevent the spread of antibiotic-resistant bacteria.
What does a positive result mean?
Does this test replace culture and sensitivity testing?
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