alexa Correlation of oral allergy syndrome due to plant-derived foods with pollen sensitization in Japan.
Geology & Earth Science

Geology & Earth Science

Journal of Geography & Natural Disasters

Author(s): Maeda N, Inomata N, Morita A, Kirino M, Ikezawa Z

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BACKGROUND: The clinical features of patients with oral allergy syndrome (OAS) due to plant-derived foods related to pollen allergy have been rarely reported in Japan.
OBJECTIVES: To evaluate the characteristics of OAS and to investigate whether pollen sensitizations are correlated with the prevalence of OAS in Japan.
METHODS: We measured specific IgE antibodies against 5 pollens in 622 outpatients (277 males and 345 females; mean age, 37 years) with atopic dermatitis, urticaria, angioedema, and food allergy during a 2-year period. Furthermore, OAS is diagnosed based on anamnesis and positive skin prick test reactions to suspected foods.
RESULTS: Eighteen of the 436 patients (4.1%) sensitized to pollens were diagnosed as having OAS. Rates of specific IgE antibody-positive responses against Japanese cedar, ragweed, orchard grass, mugwort, and alder pollen were 69.8%, 35.3%, 29.1%, 24.1%, and 19.6%, respectively. The prevalence of OAS showed a significant positive correlation with sensitization to alder (P < .001). In addition, the most frequent causative foods were found to be apple, peach, and melon. The prevalence of OAS due to apple showed a significant positive correlation with sensitization to alder (P < .001) pollen, due to peach showed a significant positive correlation with sensitization to alder (P < .001) and orchard grass (P < .05) pollen, and due to melon showed a significant positive correlation with sensitization to alder (P < .005), orchard grass (P < .05), and ragweed (P < .05) pollen.
CONCLUSION: Sensitization to pollens from species in the Betulaceae family is most strongly implicated in causing OAS in Japan.

This article was published in Ann Allergy Asthma Immunol. and referenced in Journal of Geography & Natural Disasters

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