Biomarker: M009-IgE Fusarium proliferatum

Overview

This biomarker measures serum allergen-specific immunoglobulin E (IgE) antibodies directed against Fusarium proliferatum, an airborne mold. Specific IgE reflects immune sensitization and may be relevant to immediate hypersensitivity conditions such as allergic rhinitis, asthma, conjunctivitis, eczema, or urticaria. A detectable or elevated result supports sensitization, but does not by itself establish symptomatic allergy, disease severity, or a causal relationship with environmental mold exposure. F. proliferatum contains several IgE-binding allergens, including transaldolase and vacuolar serine protease, and cross-reactivity with other fungi may affect interpretation.

Clinical Use Cases

Supports evaluation of suspected mold-related allergic rhinitis, asthma, conjunctivitis, eczema, or other immediate hypersensitivity symptoms.
Helps identify sensitization to F. proliferatum as part of an allergen-specific evaluation.
May be used alongside clinical history, exposure history, physical examination, pulmonary function testing, and other allergy tests in patients with asthma or suspected allergic fungal airway disease.
May contribute to research on fungal allergens, IgE cross-reactivity, and respiratory atopy.
Helps identify patients who may warrant counseling about relevant environmental exposures, although the result should not be used alone to diagnose illness caused by indoor mold exposure.

Specimen Types

Venous blood, collected as serum.
Plasma may be accepted by some validated immunoassays, depending on the laboratory method.
Skin-prick testing with a Fusarium extract is a related assessment of sensitization but is not the specimen used for this serum biomarker.

Measurement Methods

Automated in-vitro allergen-specific IgE immunoassay.
Enzyme-linked immunosorbent assay, or ELISA.
Immunoassay-based methods using an extract of F. proliferatum or related Fusarium allergen material.
Research methods may include immunoblotting to identify IgE-binding fungal proteins.
Results may be reported as an allergen-specific IgE concentration, qualitative class, or positive/negative interpretation according to the assay manufacturer and laboratory.

Test Preparation and Influencing Factors

Fasting is generally not required for an allergy blood test.
Tell the health care professional about all medications and supplements. Do not stop prescribed medicines unless specifically instructed.
Antihistamines can interfere with skin-prick testing, but they generally do not prevent measurement of serum-specific IgE. Laboratory or clinical instructions should take precedence.
The result should be interpreted with current symptoms, timing and intensity of exposure, medical history, and other test findings.
A positive result indicates sensitization, not necessarily clinically relevant allergy or disease.
Cross-reactivity with allergens from other fungi, including related fungal proteins, may produce a positive result without symptoms specifically attributable to F. proliferatum.
Extract composition, assay platform, and laboratory cutoff values can vary. Fungal specific-IgE tests are not uniformly standardized, and sensitivity and specificity may be limited.
Total IgE, eosinophil counts, asthma status, age, and atopic background may influence the clinical context but do not replace allergen-specific interpretation.

Synonyms

Fusarium proliferatum-specific IgE
Specific IgE to Fusarium proliferatum
Fusarium proliferatum allergen-specific IgE
Fusarium mold-specific IgE
Anti-Fusarium proliferatum IgE
M9 Fusarium proliferatum IgE
Fusarium moniliforme IgE, an older or alternative nomenclature used in some testing resources