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Daphnia-Specific IgE Antibody, Qualitative

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

This qualitative test checks for IgE antibodies directed against Daphnia, a freshwater crustacean that can rarely cause an allergic reaction.

Quick summary

["A positive result suggests an immune sensitization to Daphnia but does not by itself confirm a symptomatic allergy."]

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

Key facts at a glance

LOINC
15677-8
Short code
Deprecated Daphnia IgE RAST Ql
Synonyms
Deprecated Daphnia 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 test looks for allergen-specific IgE antibodies to Daphnia, a small freshwater crustacean. IgE is an immune-system protein associated with immediate allergic reactions.

Why might I need this test?

Your clinician may order it if you have symptoms such as hives, swelling, wheezing, or other reactions after handling or eating products containing Daphnia. It may also be considered when exposure is possible through pets, aquarium products, or work materials.

How is the test performed?

A blood sample is tested for antibodies that recognize Daphnia. The result is reported as positive or negative rather than as a specific IgE measurement.

How do I prepare for the test?

Fasting is usually not required. Tell your clinician about any medicines you take, especially antihistamines, because they may affect the interpretation of allergy testing; do not stop prescribed medicines unless instructed.

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

Daphnia IgE antibody

Frequently asked questions

Does a positive result mean I am allergic to Daphnia?
It indicates sensitization, but it does not by itself confirm a clinical allergy. Your clinician will consider symptoms, timing of reactions, and other possible causes.
What is IgE?
IgE is a type of antibody that can trigger rapid allergic reactions. Specific IgE testing measures whether your immune system has developed antibodies to a particular allergen.
Can antihistamines affect the result?
Some antihistamines can reduce allergic symptoms and may influence certain allergy evaluations. Discuss medication use with your clinician before testing and do not stop prescribed medicines without guidance.
  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