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Antibody Response to Ampicillin (IgG Class)

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

This test measures the level of antibodies your body produces in response to the antibiotic ampicillin, which helps track immunity or exposure over time.

Quick summary

["Assesses immune response to ampicillin exposure or vaccination."]

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

Key facts at a glance

LOINC
73522-5
Short code
Ampicillin ind plt IgM SerPl Ql FC
Synonyms
Ampicillin ind plt IgM SerPl Ql FC
Category
hematology
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
CPT
82784
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

This test detects specific IgG antibodies that your immune system creates when exposed to ampicillin. It’s often used in research or specialized clinical settings to study immune reactions to antibiotics.

Why It Might Be Ordered

Your healthcare provider may request this test if you’re part of a study evaluating immune responses to antibiotics, if you’ve had prolonged exposure to ampicillin, or if monitoring immune function after treatment.

Sample Collection and Preparation

A blood sample is drawn from a vein, typically in your arm. The blood is processed to separate serum (liquid part of blood without clotting factors) for testing.

What to Expect Before the Test

No special preparation is needed, but inform your provider if you’re on blood-thinning medications or have a history of bleeding disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

IgG Ampicillin Antibody

Frequently asked questions

How long does it take to get results?
Results are typically available within 3 to 7 business days, depending on lab processing times and any additional testing required.
What does a low or high antibody level mean?
A low level may mean your body hasn’t produced enough antibodies to ampicillin, possibly due to immune suppression or lack of prior exposure. A high level suggests your immune system has recognized and responded to ampicillin.
Can this test be used to diagnose infections?
No, this test does not diagnose infections. It measures immune response to ampicillin and is not a standard diagnostic tool for bacterial or viral infections.
  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