Staphylococcus aureus Toxic Shock Syndrome Toxin-1 IgE Antibody, Qualitative (Deprecated)
A qualitative test that detects IgE antibodies directed against Staphylococcus aureus toxic shock syndrome toxin-1 (TSST-1).
["A positive result suggests sensitization to TSST-1 but does not by itself confirm an allergy or toxic shock syndrome."]
Key facts at a glance
- LOINC
- 51863-9
- Short code
- Deprecated S aureus TSST-1 IgE RAST Ql
- Synonyms
- Deprecated S aureus TSST-1 IgE 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 laboratory test looks for IgE antibodies against toxin-1 produced by Staphylococcus aureus bacteria. The result is reported qualitatively, usually as detectable or not detectable.
Why might I need this test?
It may be used in specialized evaluations of suspected IgE-mediated sensitization to the toxin, particularly when symptoms repeatedly follow certain exposures. It is not a routine test for a Staphylococcus aureus infection or for diagnosing toxic shock syndrome.
How is the test performed?
The laboratory uses an antibody-detection method to determine whether TSST-1-specific IgE is present in the submitted specimen. The exact testing method and specimen requirements depend on the laboratory.
How do I prepare for the test?
Special preparation is usually not required. Tell the healthcare provider about allergic reactions, medication use, and any recent treatment with biologic drugs or immunoglobulin, because these may affect antibody-test results.
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.
A detectable result suggests that the immune system has produced IgE directed against TSST-1, which can be consistent with sensitization. It does not prove that exposure will cause symptoms and must be interpreted with the clinical history. This result alone cannot establish an active Staphylococcus aureus infection or toxic shock syndrome.
Short name
Staph aureus TSST-1 IgE antibody
Frequently asked questions
Does a positive result mean I have a Staphylococcus aureus infection?
Does a positive result confirm toxic shock syndrome?
Why is this test marked as deprecated?
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