The allergens associated with a peach allergy are called Pru p 1, Pru p 2, Pru p 3, Pru p 4, Pru p 7 and Pru p 9.
Most people suffering oral allergy type symptoms to peach are thought to be sensitised to the protein Pru p 1, which is similar in shape to Bet v 1 which is a protein found in birch pollen. This can cause cross reactions with other fruit.
Pru p 3 is a Lipid Transfer Protein (LTP), these proteins are resistant to heat and are found in many types of plants. Patients suffering from a more severe allergy to cooked fruit may be sensitised to this group of proteins.
You may have Pollen-Food Allergy Syndrome if you suffer from peach allergy with oral allergy symptoms to 3 or more of the foods mentioned in cross reactivity section.
You may be suffering from LTP Syndrome if you have reactions to various fruits, vegetables and nuts and your reactions continue to be severe after you have discarded the peel and have cooked the food.
If sensitised to Alder pollen you may have Pollen Food Allergy Syndrome and may also react to Apple, Pear, Cherry, Parsley, Celery, Almonds, and Hazelnuts
If sensitised to Birch pollen you may have Pollen Food Allergy Syndrome and may also react to Kiwi, Cherry, Pear, Plum, Nectarine, Apricots, Apple, Tomato, Celery, Carrot, Potato, Parsnip, Pepper, Dill, Cumin, Peas, Coriander, Fennel, Hazelnut, Walnut, Almonds, Peanuts, Lentils and Beans
Common foods involved in LTP allergy include hazelnuts, almonds, walnuts, apples, dried fruit, lettuce and tomatoes.