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Levofloxacin Antibody Screening (Serum/Plasma)

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

This test detects antibodies in your blood that may have developed in response to the antibiotic levofloxacin, used to treat bacterial infections. It helps monitor immune system response or assess exposure.

Quick summary

["This test checks for antibodies linked to levofloxacin use, aiding in infection management or immune response evaluation."]

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

Key facts at a glance

LOINC
53716-7
Short code
levoFLOXacin Islt SlowMyco
Synonyms
levoFLOXacin Islt SlowMyco
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
method-for-slow-growing-mycobacteria
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 Is Done

Your healthcare provider may order this test if you’ve been treated with levofloxacin or if you have a suspected allergic reaction, immune response, or need to assess long-term exposure. It can also be part of research or clinical studies investigating drug interactions with the immune system.

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. If you’re on blood-thinning medication, let your provider know before the test.

What the Test Results Mean

Positive results indicate the presence of antibodies against levofloxacin, which may suggest your body has recognized the drug as foreign. This could be part of an immune response or allergic reaction. Negative results mean no detectable antibodies were found.

Common Reasons for Testing

This test is less commonly used in routine clinical practice but may be included in specialized studies, allergy evaluations, or research protocols involving antibiotic exposure. It’s not typically ordered for general infection monitoring.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Levofloxacin Antibody Test

Frequently asked questions

What does it mean if my test is positive?
A positive result suggests your immune system may have mounted an antibody response to levofloxacin. This could indicate an allergic reaction, hypersensitivity, or immune-mediated effect. Your healthcare provider will discuss next steps, such as adjusting medication or monitoring for symptoms.
Can this test help diagnose a drug allergy?
While this test can detect antibodies, it’s not definitive for diagnosing a drug allergy. Allergies are often diagnosed through clinical symptoms, skin testing, or other allergy-specific tests. Antibody presence alone doesn’t confirm an allergy—it may indicate exposure or immune activity.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your provider will contact you with the outcome once it’s ready.
  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