Duration
As described above, there are cross-allergies that are seasonal and occur mainly in spring and autumn. With all other forms of cross-allergy, however, the following applies: once a sensitization has taken place, the allergy usually persists. Its degree of development can change, but it rarely disappears completely.
Therapeutically, hyposensitization can be used to achieve an (almost) complete disappearance of the allergic reaction to a certain allergen. However, it cannot be used for all allergens. An allergy to grass pollen is one of the most common allergies of all and is popularly known as hay fever.
There are numerous cross-allergies that can accompany an allergy to grass pollen. The foods to which an allergy can exist include potatoes, peas, kiwis, tomatoes, peanuts, soy and melon. Allergies can also develop on cereals such as rye, wheat, oats and barley, which can complicate the diet considerably.
If you are allergic to birch pollen, you may also have cross-allergies to pollen from many other plants such as alder, ash, oak and beech. Various foods can also be the target of a cross-allergy to birch pollen. These include nuts such as hazelnuts and walnuts, almonds, carrots, milk and soy milk.
Numerous fruit products can also be affected by a cross-reaction. These include apples, pears, peaches, nectarines, cherries, berries such as raspberries or strawberries and blackberries and plums. In rare cases, kiwis and vegetables such as celery or tomatoes can be affected.
Numerous herbs and spices, including parsley and pepper, can also lead to a cross-allergy. If there is an allergy to apples, it is in most cases not a direct apple allergy but a cross-allergy. The main allergens in this case are often pollen from different trees, for example birch pollen.
Research has shown that not all apple varieties have the same allergenic potential.In particular, the more well-known apple varieties such as Braeburn, Golden Delicious and Granny Smith, which are offered in supermarkets, are said to cause cross-allergies, while the rather unknown older apple varieties such as Boskoop, which are offered in particular at weekly markets, are said to cause fewer allergies. Also the preparation method of the apples is crucial for the development of allergies. Thus an allergic reaction develops particularly with raw and unprocessed consumed apples whereas for example apple sauce or apple pie often does not cause any problems.
Grated apples should also be better tolerated than unprocessed apples. Allergies to antibiotics like penicillin are relatively common. However, there are also other antibiotics besides penicillin which belong to the group of penicillins.
These include amoxicillin and flucloxacillin. Patients with an allergy to penicillin are relatively likely to be allergic to these substances as well. Another group of antibiotics has a cross-allergy due to a molecular building block, a beta-lactam ring, which is present in both antibiotic groups.
This group are the cephalosporins. These include cefuroxime, ceftriaxone and ceftazidime. Also with antibiotics from the group of the Carbapenems theoretically a cross allergy can occur since also these contain a beta-lactam ring.
If an allergy exists on an antibiotic then this shows up for example by a fast occurrence of skin rash shortly after the income. The skin can become red, pustules or wheals can develop. There is a danger of oedema (swelling) in the larynx area which can be life-threatening.
An allergy to antibiotics only occurs when a sensitization has already taken place. This means that a patient who takes a medication from the group of penicillins, cephalosporins or carbapenems for the first time cannot develop an allergic reaction. However, an allergic reaction can occur as soon as the second medication is taken.
There are also reactions to antibiotics which only become apparent after a few days or weeks. If a latex allergy exists primarily, cross-allergies to numerous foods can occur. The probably most well-known cross allergy with a latex allergy is that on bananas.
But an allergic reaction can also show on bananas.
- Passion fruit
- Mango
- Papaya
- Kiwi and
- Peach and
- Tomato
- Celery and
- Peppers, and
- Chestnuts
An allergic reaction to rye and/or wheat is usually the result of a cross-reaction. The primary allergen here is usually cereal pollen.
If you are allergic to cereal pollen, you may also suffer from cross allergies to potatoes, peas, kiwi, melon, tomatoes and other grains such as oats and barley. It should be remembered that such allergies usually only occur with food in its raw form, so boiled or similarly prepared potatoes do not usually trigger an allergic reaction and can therefore be consumed safely. If an allergy to nuts exists, the nut can be the primary allergen or a cross-allergy.
If it is a cross-allergy, birch pollen or grass pollen can be used as the primary antigen. A nut allergy can also exist as such, the nut is then the primary allergen. Here again, other foods can become cross-allergens.
These include almonds, poppy seeds, sesame seeds, pistachios, kiwis and strawberries. Peanuts do not belong to the actual nuts (nuts) but to the legumes, but they can also act as a cross-allergen in case of an allergy to grass pollen. Cross-allergies with walnuts and almonds play a role especially in people with an allergy to birch pollen.
A certain allergen of birch, the so-called major allergen, is similar to proteins that are also present in walnuts and almonds. The immune system cannot distinguish this similarity sufficiently and thus reacts to both with an allergic reaction. The food allergy is rather mild.
The protein that triggers the allergic reaction in walnuts and almonds is destroyed by heat and thus becomes digestible for allergy sufferers. In addition to walnut and almond, many other fruits and vegetables are also cross-allergenic to birch pollen. In addition, other nut allergies can also have a cross-allergy to both almonds and walnuts.Here the patients react to another protein in the nuts.
In contrast to the one described above, this one is not heat-sensitive. For this reason, it is important to check whether nuts are contained in processed products. The allergic reaction is rather strong, no matter which nut is consumed.
An allergy to kiwi can occur in the context of a cross-allergy. The possible primary allergens include nuts, birch pollen and grass pollen. But a kiwi allergy can also exist without a cross-allergy.
Possible cross-allergies that can result from an allergy to kiwis are allergies to grass pollen, latex and foods such as pineapple, apples, carrots, potatoes and rye and wheat flour. An allergy to citrus fruits is rather rare. Cross allergies are not known so far.
If an allergy to mandarins exists, their consumption should be avoided. An allergy on tomatoes can exist in the sense of a cross allergy. The primary allergen is then usually birch or grass pollen.
For people who are allergic to pollen, the symptoms usually disappear in autumn and winter, often the cross-allergies are hardly noticeable in these months so that tomatoes can be consumed better in the autumn and winter months. Whether this is actually the case, each person affected must of course try it out individually for himself. A cross-allergy to strawberries can develop in people with a birch pollen allergy or a nut allergy.
Food: Vegetables such as peppers, celery, carrots, tomatoes, potatoes and cucumber; fruits such as melons, mangoes, apples and peanut pollen: Birch, dandelion, sunflower Numerous spices and herbs such as coriander, chili, dill, ginger, chamomile, garlic, caraway, nutmeg, paprika, bell pepper, cinnamon, parsley, thyme, basilIn the case of an allergy to mugwort, there is also a known cross-allergy to paprika. In addition, birch pollen allergy has a cross-allergy to paprika powder, which is often used as a spice. A third cross-allergy to paprika is known to exist in latex allergy.
Certain proteins in latex are similar to those in paprika and many other fruits and vegetables, which is why the cross-reaction occurs. Especially spices like aniseed, basil, dill, fennel, oregano, cumin, coriander and thyme SoybeansIn an allergy to cat hair, there is no such pronounced cross-reactivity as is the case with pollen or grasses. A known cross allergy is pork.
However, it is not very pronounced and the risk of actually having a reaction when eating pork is very low. Cross allergies to nickel are known from the dental field. There are cross-allergies to palladium or cobalt, for example. Rarely people with a nickel allergy also react to copper or chromium.