Skip to content

Fluoroquinolone Antibody, Serum (Qualitative Immunoassay)

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

This test checks for the presence of antibodies to fluoroquinolone antibiotics, which are a class of medications used to treat bacterial infections.

Quick summary

["It helps determine if your immune system has recognized and responded to fluoroquinolone exposure, possibly after treatment or exposure to these drugs."]

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

Key facts at a glance

LOINC
39312-4
Short code
FLUAV N2 NAb Ser Ql Nt
Synonyms
FLUAV N2 NAb Ser Ql Nt
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
neut
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 order this test if you’ve recently been exposed to fluoroquinolone antibiotics (such as ciprofloxacin or levofloxacin) and want to assess whether your body has developed immunity or an allergic response. It could also be used in research or specialized clinical scenarios to monitor immune response patterns.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample from a vein in your arm. The test involves drawing a small amount of serum, which is the liquid part of blood after clotting. This is a standard blood draw procedure.

What the Test Results Mean

The result is qualitative (yes/no) and indicates whether antibodies to fluoroquinolones were detected in your serum. A positive result suggests your immune system has recognized these antibiotics, while a negative result means no detectable antibodies were found.

Common Reasons for Testing

This test is less commonly performed in routine clinical practice but may be used in specific cases like allergy evaluations, vaccine research, or studying immune responses to antibiotics in specialized studies.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Fluoroquinolone Antibody Test

Frequently asked questions

What does a positive or negative result imply?
A positive result indicates your immune system has likely encountered fluoroquinolone antibiotics before, triggering an antibody response. This could be relevant for allergy assessment or immune response studies but does not directly indicate infection or drug effectiveness.
How long does it take to get results?
Results are typically available within 24 to 48 hours, depending on laboratory processing times. Your healthcare provider will contact you with the results.
Can I take anything before the blood draw?
No special preparations are needed. However, inform your healthcare provider if you’re on any medications or have conditions that might affect blood tests.
  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