Allergy Mold Panel, Complete

Alternaria alternata is a ubiquitous dematiaceous fungus found outdoors on decaying vegetation and indoors in damp environments. Sensitisation triggers mast-cell-bound IgE cross-linking upon allergen encounter, releasing histamine and other mediators. Alternaria is a major outdoor allergen in temperate climates and a known trigger of severe asthma.

Detection of Alternaria-specific IgE confirms sensitisation in patients with seasonal or perennial rhinitis, conjunctivitis, or asthma exacerbated by outdoor activity or damp weather. High titres correlate with increased risk of asthma exacerbations and may guide environmental control and immunotherapy decisions.

Aspergillus fumigatus is a thermotolerant saprophyte that releases abundant airborne conidia. IgE-mediated sensitisation can manifest as allergic rhinitis or asthma, and in susceptible individuals — particularly those with cystic fibrosis or asthma — as allergic bronchopulmonary aspergillosis (ABPA), a mixed type I and type III hypersensitivity disorder.

Aspergillus-specific IgE is elevated in ABPA, where it is accompanied by total IgE, eosinophilia, and pulmonary infiltrates. Isolated sensitisation without ABPA can still contribute to poorly controlled asthma. The result guides antifungal or corticosteroid therapy and distinguishes ABPA from invasive aspergillosis, which is not IgE-mediated.

Cladosporium herbarum is one of the most common airborne moulds worldwide, peaking in warm, dry weather. Its spores are small and easily inhaled, triggering IgE production in susceptible individuals. Cladosporium sensitisation often coexists with other mould and pollen allergies.

Cladosporium-specific IgE supports the diagnosis of seasonal or perennial allergic rhinitis and asthma when symptoms correlate with outdoor or indoor mould exposure. Because Cladosporium is so widespread, positive results are common but should be interpreted in the context of symptom timing and other sensitisations.

Penicillium species are common indoor moulds that thrive in water-damaged buildings, on spoiled food, and in damp basements. Penicillium notatum (also called Penicillium chrysogenum) releases allergenic proteins that induce IgE formation in sensitised individuals.

Detection of Penicillium-specific IgE confirms sensitisation in patients with perennial rhinitis or asthma worsened by indoor dampness. It is particularly relevant in occupational settings (e.g., food processing, agriculture) and in homes with visible mould or water damage.

Candida albicans is a commensal yeast of the human gut and mucosa. While invasive candidiasis is not IgE-mediated, IgE antibodies to Candida proteins can develop in atopic individuals and have been implicated in some cases of chronic urticaria, eczema, and respiratory symptoms, though the clinical significance of isolated Candida sensitisation remains debated.

Candida-specific IgE is occasionally elevated in patients with atopic dermatitis or chronic urticaria, and some practitioners consider it in the context of suspected 'fungal overload' syndromes, though robust evidence for the latter is limited. Interpretation should be cautious and correlated with clinical context rather than prompting antifungal treatment based on serology alone.

Mucor species are saprophytic zygomycetes found in soil, decaying organic matter, and occasionally indoor air in damp environments. IgE-mediated allergy to Mucor is less common than to Alternaria or Aspergillus but can occur in heavily exposed individuals.

Mucor-specific IgE is relevant in patients with unexplained respiratory allergy who have occupational or residential exposure to composting, agriculture, or water-damaged buildings. It is not associated with invasive mucormycosis, which occurs in immunocompromised hosts and is not IgE-mediated.

Total IgE reflects the sum of all circulating IgE antibodies, both allergen-specific and polyclonal. It is elevated in atopy, parasitic infection, some immunodeficiencies, and ABPA. While not specific, total IgE provides context for interpreting specific IgE results and is a required criterion in the diagnosis of ABPA.

Markedly elevated total IgE (>1000 kU/L) in the presence of Aspergillus-specific IgE, eosinophilia, and pulmonary infiltrates suggests ABPA. Moderate elevations are common in polysensitised atopic patients and add little diagnostic value in isolation, but serial monitoring can track disease activity in ABPA or guide omalizumab dosing.