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Salmonella IgG Antibody, Qualitative

Published: August 9, 2026Updated: August 17, 2026

A qualitative test that detects IgG antibodies related to Salmonella exposure, which may help evaluate a previous infection or immune response.

Quick summary

["A positive result generally indicates prior exposure to Salmonella, but it does not by itself confirm an active infection."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
19045-4
Short code
Deprecated Salmon IgG RAST Ql
Synonyms
Deprecated Salmon IgG RAST Ql
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
10
Ref high
40
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
84484
SNOMED
302774002
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 IgG antibodies to Salmonella in a patient specimen. IgG antibodies usually develop after the immune system responds to an infection or exposure.

Why might I need this test?

It may be used to evaluate suspected Salmonella exposure, investigate persistent symptoms, or assess whether immune antibodies to Salmonella are present. Results are interpreted together with symptoms, exposure history, and other laboratory findings.

How is the test performed?

A laboratory analyzes a patient specimen for Salmonella-specific IgG using a qualitative antibody method. The result is generally reported as positive or negative.

How do I prepare for the test?

Follow the laboratory's instructions for specimen collection and timing. If a blood sample is required, you may be asked to avoid eating or drinking for a short period beforehand.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Salmonella IgG Antibody Test

Frequently asked questions

Does a positive result mean I currently have Salmonella?
Not necessarily. IgG antibodies can remain after an earlier infection, so a positive result usually requires clinical context and may need confirmation with other testing.
Can this test be negative during an infection?
Yes. Antibodies may not be detectable early in the course of infection, particularly soon after exposure.
What specimen is required for this test?
The specimen depends on the laboratory's method. Confirm the collection instructions with the healthcare provider or laboratory before the test.
  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 17, 2026. · Read our editorial policy