In the UK celery is listed as a top 14 allergen which needs to be labelled in packaged food.
There are 6 allergens associated with celery allergy - the main allergen in celery is Api g 1 which is similar in shape to the Bet v 1 allergens which can cause oral allergy type symptoms.
Two of the proteins found in celery are lipid transfer proteins, Api g 2 and 6.
Api g 4 is a profilin protein, these are panallergens and found in many fruits and vegetables.
Celery also contains chemicals called furanocoumarins, these can act as a contact allergen. When they come in contact with the skin it can become more sensitive to sunlight which can cause blistering. This is more common as an occupational allergy with people who pick, pack and process celery. This is known as phototoxicity. Additionally there have been case reports of ingestion of celery causing severe sunburn and blistering in rare cases.
You may have Pollen-Food Allergy Syndrome
if you suffer from celery allergy with oral allergy symptoms to 3 or more of the foods mentioned in cross reactivity section.
The lipid transfer proteins in celery may cause problems if you suffer from LTP Syndrome
If sensitised to birch pollen you may have Pollen Food Allergy Syndrome and may also react to apple, kiwi, pear, peach, plum, nectarine, apricots, cherries, tomato, celery, potato, parsnip, pepper, dill, cumin, peas, coriander, fennel, hazelnut, walnut, almonds, peanuts, lentils and beans.
If sensitised to alder pollen you may also react to apple, cherry, peach, pear, parsley, celery, almonds and hazelnuts.
Common foods involved in LTP allergy include kiwi, strawberries, sunflower seeds, walnut, apple, mulberry, banana, pea, apricot, cherry, plum, almond, peach pomegranate, raspberry, tomato, grape, celery, peanut, asparagus, cabbage, broccoli, chestnut, lemon, tangerine, orange, hazelnut, lettuce, lentils, lupin, green bean, pear, mustard, wheat and maize.
Other foods containing plant profilins are kiwi, pineapple, celery, peanut, chilli, watermelon, orange, hazelnut, melon, strawberry, soya, barley, walnut, lychee, lupin, apple, banana, date, cherry, almond, peach, pear, mustard, tomato, aubergine and wheat.
Allergen Encyclopedia - Celery
DermNet NZ - Celery
Anaphylaxis Campaign - Celery Allergy
Allergy information for: Celery, Celeriac (graveolens)
Types of Food Allergy
Oral Allergy Syndrome (OAS) or Pollen Fruit Syndrome (PFS)
Worcester university Pollen Calendar
Articles and Journals
Phototoxic and Photoallergic Contact Reactions, 2020
Food allergy to apple, peach and celery in atopic dermatitis patients, analysis of sensitisation to molecular components, 2020
Can patients with oral allergy syndrome be at risk of anaphylaxis?, 2020
Pollen-food allergy syndrome in children, 2020
Clinical reactivity of celery cultivars in allergic patients: Role of Api g 1, 2018
Sensitization Prevalence, Antibody Cross-Reactivity and Immunogenic Peptide Profile of Api g 2, the Non-Specific Lipid Transfer Protein 1 of Celery, 2011
The prevalence of positive reactions in the atopy patch test with aeroallergens and food allergens in subjects with atopic eczema: a European multicenter study, 2004
Severe Phototoxic Burn Following Celery Ingestion, 1990
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