Cross allergies/What is what cross allergy?

Cross allergies/What is what cross allergy?
For certain people already sensitized with an allergen, the first contact with a new allergen can involve a reaction allergen. That occurs because certain allergens resemble each other much 1.

Various types of cross allergies
“food/pneumallergenes”

The syndrome of oral allergy: the most frequent demonstration 2
A prurit and a swelling of the lips, itchings inside the ears, the tight throat
- Its symptoms, furtive, occur in the minutes which follow the consumption of a fruit or a believed vegetable
Many are the parameters which increase its intensity
- Introduced consequent Quantity
- Consumption of the peel of the fruit
- Ripe Fruit
- Consumption of the fruit for the period of pollination of plants with which there is division of cross allergens
Most frequent 3
Pollens of birch – Fruits or vegetables
Pollens of made up (armoise, ambrosia) – Celery, spices
Pollens the graminaceous ones – Tomato
The allergic ones to the acarina should also be wary
Gastropods (snails, bulots) and other cephalopods (squids)
Syndromes with the evocative names 4
The syndrome “pig-cat”
The syndrome “egg-bird”
- The people exposed to the feathers or dejections of birds can develop later a food allergy to egg
“food/latex” 5

Lawyer, banana, kiwi, sweet chestnut are the food most frequently implied in this type of cross reactions
But many are the other food being able to be quoted
Papaw, pineapple, groundnut, melon, tomato, celery, fruit of passion, rye, lemon, apricot, buckwheat, lettuce…
“food/food”

They just as easily relate to milks of various mammals (cow, mare, she-ass) but also the meats of various animals 6
Egg in all the forms
The exposure to egg proteins, mainly professional, can precede the appearance of a food allergy to egg
With groundnut, finally, the possibilities of cross reactions are multiple:
Reactions crossed with the family of leguminous plants: Pea, soya, broad beans, beans, lenses, lupin
But also with the family of the oilseeds: Hazel nut, nut, pistachio, pinion, cashew nut, Brazil nut
In a general way, the allergies crossed between fruits or vegetables of the same family, although rare, are possible 7

Which are the signs?
Just like in the food allergy, the cross allergy appears in various forms. 8

Syndrome of oral allergy
Rhinitis, conjunctivitis, asthma laryngé angio-edema
Urticaria of contact or generalized, angioedème cutaneous
Vomiting, diarrheas
Shock anaphylactic