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Cross-reactivity

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Pollination and Flower Structure

Pollination and Flower Structure

Flowers are the reproductive, seed-producing structures of angiosperms. Typically, flowers consist of sepals, petals, stamens, and carpels. Sepals and petals are the vegetative flower organs. Stamens and carpels are the reproductive organs.

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Related Experiment Video

Updated: Jul 15, 2026

Collection and Identification of Pollen from Honey Bee Colonies

Collection and Identification of Pollen from Honey Bee Colonies

Published on: January 19, 2021

Cross-reactivity between Parietaria pollen and beet.

P L Minciullo¹, G Mistrello, M Patafi

¹School and Division of Allergy and Clinical Immunology, Department of Human Pathology, University of Messina, Messina, Italy.

Allergologia Et Immunopathologia

|April 13, 2007

Summary

Beet allergy is rare, with few reports of asthma from cooked beet vapor. This study identified two patients with allergic rhinitis and positive tests to Parietaria and beet, suggesting potential cross-reactivity.

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Area of Science:

Immunology
Allergology
Food Science

Background:

Beet allergy is exceptionally rare in clinical reports.
Previous literature primarily documents asthma linked to inhaled cooked beet vapor.

Observation:

Two patients presented with allergic rhinitis.
Both patients exhibited positive skin prick tests exclusively to Parietaria and beet.
This clinical presentation prompted an investigation into potential cross-reactivity.

Findings:

Laboratory assays confirmed the presence of beet-specific immunoglobulin E (IgE) in both patients' sera.
Evidence suggested a possible cross-reactivity between Parietaria pollen and beet in one patient.

Implications:

Highlights the potential for beet allergy, particularly in individuals sensitized to Parietaria.
Suggests the need for further research into the immunological mechanisms underlying beet allergy and Parietaria cross-reactivity.
Informs clinical practice regarding the diagnosis and management of suspected beet allergies.