Clam IgE Level
Private Clam IgE Level blood test in London for £55, measuring one shellfish-allergy marker with results expected in around 2 business days.
Turnaround time
2 business days
Biomarkers count
1
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Overview of the Clam IgE Level
The Clam IgE Level blood test measures IgE antibodies directed against proteins found in clam.
The test contains 1 biomarker: Clam IgE Level.
Clams are molluscs and belong to the wider group of foods commonly described as shellfish.
Shellfish allergy includes reactions to crustaceans, such as prawns, crab and lobster, and molluscs, such as clams, mussels, oysters, scallops, squid and octopus.
Allergy patterns between these groups can vary.
A person who is allergic to one shellfish does not automatically have clinical allergy to every crustacean and mollusc, although cross-reactivity can occur.
The Clam-specific IgE test detects sensitisation.
Sensitisation means that the immune system has produced IgE antibodies capable of recognising clam proteins.
It is not identical to clinical food allergy.
Some people have measurable Clam-specific IgE without developing symptoms when clam is eaten.
Conversely, laboratory tests are not perfect, and a highly convincing immediate reaction history still requires specialist consideration even when a result is low.
Specific-IgE concentration also cannot reliably predict the severity of a future allergic reaction.
A person with a relatively modest IgE concentration can still experience a significant reaction.
The result should therefore be interpreted alongside what was eaten, the amount consumed, how quickly symptoms developed, whether reactions occurred repeatedly and whether other shellfish allergies are known.
What Does the Clam IgE Level Test Check?
This test measures 1 biomarker.
Clam IgE Level
Measures IgE antibodies directed against clam proteins. Detectable specific IgE demonstrates sensitisation but does not independently confirm clinical clam allergy or predict future reaction severity.
Who May Benefit From the Clam IgE Level Test?
Testing may be useful where symptoms after eating clam suggest an immediate IgE-mediated food allergy.
People who repeatedly react after eating clams - A consistent relationship between exposure and immediate symptoms makes specific-IgE testing more clinically relevant.
People who develop hives after eating clam - Acute urticaria can form part of an IgE-mediated food reaction.
People with swelling of the lips or face after shellfish exposure - Angioedema may occur during food allergy.
People with itching or tingling in the mouth after eating clam - Immediate oral symptoms can be associated with allergic reactions.
People who develop wheezing or breathing difficulty after eating shellfish - Respiratory involvement can indicate a significant systemic reaction.
People who vomit soon after clam exposure - Immediate gastrointestinal symptoms can occur in IgE-mediated allergy.
People with an allergy to another mollusc and suspected clam reaction - Cross-reactivity may be relevant, but individual foods should be assessed according to the clinical history.
People with a crustacean allergy who have reacted to clam - Allergy to prawns or crab does not automatically prove clam allergy, so targeted testing may be useful.
People unable to undergo skin-prick testing - Serum-specific IgE provides an alternative way of assessing sensitisation.
People specifically advised to obtain Clam IgE testing - Testing can be arranged where an allergy clinician or GP has requested the individual allergen.
How to Prepare
Do not perform an unsupervised clam challenge simply to determine whether symptoms recur.
Where the reaction history suggests a potentially serious shellfish allergy, further assessment should be undertaken with an allergy-trained healthcare professional.
Symptoms and Reasons to Consider the Clam IgE Level Test
IgE-mediated clam allergy typically causes symptoms within minutes to a relatively short period after exposure, although timing can vary.
Hives or an itchy raised rash - Urticaria is a common manifestation of immediate food allergy.
Swelling of the lips, eyelids or face - Angioedema can occur as part of a systemic IgE-mediated reaction.
Itching or tingling of the mouth - Oral symptoms can occur rapidly following ingestion.
Tongue or throat swelling - Swelling affecting the airway can signal a potentially serious reaction.
Wheezing or shortness of breath - Respiratory symptoms following food exposure can occur during anaphylaxis.
Vomiting shortly after eating clam - Acute gastrointestinal symptoms can form part of a systemic food-allergic reaction.
Abdominal cramping or diarrhoea soon after exposure - Gastrointestinal involvement can occur, although these symptoms have many other possible causes.
Dizziness, faintness or collapse - Cardiovascular involvement can occur during severe anaphylaxis.
Repeated immediate reactions to clam-containing meals - A reproducible exposure-response pattern increases the likelihood of true clinical allergy.
These symptoms can also occur because of food poisoning, intolerance, reactions to another ingredient or other medical conditions.
Difficulty breathing, significant tongue or throat swelling, collapse or rapidly progressing symptoms after eating clam or another food require emergency medical treatment.
How to Book Your Clam IgE Level Test
Booking your Clam IgE Level test with London Blood Tests is straightforward.
Choose the Clam IgE Level
Select the individual Clam-specific IgE blood test.
Select your sample collection option
Choose an in-clinic blood draw or professional home or hotel phlebotomy.
Attend your appointment
A trained healthcare professional collects the required venous blood sample.
Laboratory analysis
Your serum is analysed for IgE antibodies directed against clam proteins.
Receive your results securely
Your authorised allergy result is delivered securely and can be reviewed with a GP or allergy specialist where appropriate.
When Will I Receive My Results?
The expected laboratory turnaround for the Clam IgE Level test is approximately 2 business days after your blood sample reaches the laboratory.
Specific-IgE testing is performed using specialist allergy laboratory methodology. Once the assay has been completed, the result undergoes laboratory quality control and authorisation before release.
If a broader shellfish profile, additional individual allergens or allergen-component testing is requested following the result, those are separate investigations and may have their own turnaround times.
Understanding Your Results
A low or undetectable Clam-specific IgE result means that little or no measurable sensitisation to clam proteins was identified by the assay.
This makes IgE-mediated clam allergy less likely but does not completely override a highly convincing clinical history.
A detectable or elevated result indicates sensitisation.
Sensitisation does not automatically mean that eating clam will cause symptoms.
Some sensitised people tolerate the food, while others develop clinically important reactions.
The numerical IgE concentration cannot reliably predict whether a future reaction will be mild or severe.
Cross-reactivity between shellfish species can occur, but a positive clam result should not automatically be used to diagnose allergy to every other mollusc or crustacean.
Where the laboratory result and clinical history are inconsistent, an allergy specialist may consider skin-prick testing, testing to related allergens or a medically supervised food challenge where appropriate.
Why Book With London Blood Tests?
Private clam allergy testing in London - Access targeted Clam-specific IgE measurement privately.
Single-allergen assessment - Test clam independently rather than purchasing a broad panel where only one food is suspected.
No deliberate food exposure required - The blood sample can be collected without eating clam beforehand.
Antihistamines generally do not interfere - Serum-specific IgE testing is usually unaffected by antihistamine medication.
Useful alongside shellfish history - The result can be interpreted according to reactions to molluscs and crustaceans.
Fast results - Laboratory turnaround is approximately 2 business days.
Secure reporting - Receive your authorised allergy result securely.
Clear pricing - The Clam IgE Level test costs £55.
Private Clam IgE Level Blood Test in London
London Blood Tests provides private Clam IgE Level blood testing in London for adults and children requiring targeted assessment of suspected clam sensitisation.
The test costs £55 and measures one biomarker: Clam IgE Level.
Results are expected approximately 2 business days after laboratory receipt.
A positive result demonstrates IgE sensitisation but does not automatically confirm clinical allergy or predict the severity of a future reaction.