Pseudomonas aeruginosa IgG Antibody — Radioallergosorbent Test, Qualitative
A qualitative RAST test looks for IgG antibodies to Pseudomonas aeruginosa, which can indicate prior exposure but cannot by itself confirm an active infection.
["Detected IgG antibodies suggest prior exposure to Pseudomonas aeruginosa, while other clinical findings are needed to assess active infection."]
Key facts at a glance
- LOINC
- 21445-2
- Short code
- Deprecated Pea IgG RAST Ql
- Synonyms
- Deprecated Pea 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 qualitative test checks a submitted sample for IgG antibodies directed against Pseudomonas aeruginosa, a bacterium that can cause pneumonia, urinary tract infections, wound infections, and infections in people with weakened immune systems. The test code does not identify the specimen type.
Why might I need this test?
The test may be ordered to investigate a suspected bacterial exposure or infection, particularly when symptoms persist or recur. It can provide information about the immune response to the bacterium, but it is not a substitute for cultures or other tests used to identify an active infection.
How is the test performed?
The laboratory uses the RAST method to examine the sample for antibodies that bind to Pseudomonas aeruginosa antigens. The result is generally reported qualitatively as detected or not detected, although the exact reporting language may vary by laboratory.
How do I prepare for the test?
Special preparation is usually not required for this antibody test. Follow the laboratory's instructions about the required specimen, timing, and any fasting requirements, and tell the healthcare provider if you have a known immune deficiency or are taking immune-suppressing medicines.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Detectable Pseudomonas aeruginosa IgG antibodies may indicate previous exposure or an immune response to the bacterium. Antibodies can remain detectable after an infection has resolved, so a positive result alone does not establish active disease. Results should be interpreted with symptoms, culture results, and other clinical findings.
Short name
Pseudomonas aeruginosa IgG antibody
Frequently asked questions
Does a positive result mean I currently have a Pseudomonas aeruginosa infection?
What does a negative or not-detected result mean?
What is the RAST method?
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 17, 2026. · Read our editorial policy