The Utility of Serum Tryptase in the Diagnosis of Shrimp- Induced Anaphylaxis

Mahidol University

Status: Completed

Conditions: Food (Shrimp) Allergy

Treatments: Procedure: shrimp challenge

Study type: Interventional

Funder types: Other

Identifiers

NCT01619605

669/2551(EC4)

Details and patient eligibility

About

The purpose of this study was to investigate the utility of serum tryptase for the confirmation of shrimp-induced anaphylaxis.

Full description

The diagnosis of anaphylaxis is based primarily on the clinical history. In some circumstances, inability to confirm the clinical diagnosis such as present with unusual manifestation, or when skin signs are absent likely contributes to underrecognition and undertreatment of the disease.

Currently, products of mast cell activation (histamine and total tryptase) can be measure in clinical laboratories as markers of acute anaphylaxis events, however these tests have clinically relevant limitations.

Therefore, development of laboratory tests with improved sensitivity and specificity that will support the clinical diagnosis of anaphylaxis are needed.

In addition, shrimp is the major cause of seafood anaphylaxis among Thai children.

Enrollment: 39 patients

Sex: All

Ages: 5 to 18 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• a history of shrimp allergy

Exclusion criteria

• severe anaphylactic reaction from seafood
• pregnancy
• underlying diseases such as cardiovascular, hepatobiliary, and renal diseases
• on systemic corticosteroid or β-blocking agents

Trial design

Primary purpose: Diagnostic

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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39 participants in 1 patient group

Shrim

Experimental group

Treatment:

Procedure: shrimp challenge