What phenomenon links sensitivity to birch pollen and allergic reactions to peaches?
Answer
Oral Allergy Syndrome (OAS)
Oral Allergy Syndrome (OAS) is a specific type of cross-reactivity that occurs when the immune system mistakes proteins found in one substance, like birch pollen, for similar proteins found in certain foods, such as peaches. Because the protein structures are sufficiently alike, the body mounts a defense, triggering a reaction. This typically results in mild, localized symptoms, most commonly involving itching within the mouth area immediately after consuming the fruit. Understanding this connection highlights that the allergy is often rooted in existing pollen sensitivities rather than a unique, severe peach toxin.
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