airborne allergens (aeroallergens) are substances that cause an allergic reaction in the body (sensitization), getting into the respiratory tract.This article will talk about the types of allergens to the human body.
To air allergen has pathogenic effect, it must be contained in the air in considerable quantities, the particles should be relatively small and long to remain in suspension.Airborne allergens are pollen, fungal spores, including mold, animal products (particles of life of mammals, insects, mites), dust (organic and inorganic), occasionally algae.
In the external environment, many air allergens appear only in specific for each season.Separately they occur sporadically.During the period of abundant bloom pollen concentration can be high.It is influenced by the temperature and humidity, wind speed and direction.With increasing temperature, that is usually in the middle of the day, the selection of pollen increases.
also increases the concentration in the air of some plant species (eg, r
very common cause of allergic rhinitis for the human body and asthma are plants.Because plants can cause allergic grasses and trees.However, the plant does not become a cause allergies themselves, but because the flowering period they produce pollen.Pollen is transferred in different ways: by insects, wind or animals.Pollen allergy often causes symptoms, but it does not mean that there is an allergy to the plants themselves.For example, if there is an allergy to pollen of oak, by itself it is not a tree.There can be no fear of stepping on the oak parquet and easy to use oak furniture.
Generally, pollen, provoking allergies or asthma, produces a very small percentage of all herbs.Most of these species are allergenic forage or lawn.It is known that pollen allergy causes about 50 species of flowering plants.These include cereals (rye, timothy, fescue, foxtail, bluegrass), and plants of the family Asteraceae (dandelion).Allergies to pollen may be many other plants: sage, quinoa, sorrel.And an allergic reaction to the pollen of one of these plants evidence of hypersensitivity to the others.
much more often than other plants cause allergies and asthma attack is ambrosia.Many allergies are sensitive to ragweed, are also susceptible ryegrass - weeds growing in crops of flax.The flowering period of ragweed usually begins in mid-August and nakapchivaetsya in October and / or until the first frost.Ragweed produces most of the pollen between the 6 and 11 o'clock in the morning.In hot and humid weather, pollen is usually less.Tree pollen has smaller dimensions than the grass pollen.Period flowering trees that produce allergenic pollen, usually lasts from late winter or early spring to early summer.As a result, the risk of suffering from pollen of trees is lower than from grass pollen.
to trees that can produce the most allergenic pollen include elm, willow, poplar, birch, beech, oak, chestnut, maple, boxwood, ash and some cedar.Conifers (spruce, pine, fir) are wind-pollinated.Although around pollen is present in significant quantities, it causes a rare allergy.Many people with allergies think that poplar fluff is the cause of their disease.In fact, they are more susceptible to grass, pollen peak formation coincides with the period of seed dispersal poplar.Poplar pollen allergy is much less common than it is credited.
Flowers produce heavy and sticky pollen that is carried by the fact that sticks to the body of insects and animals.Therefore, the flowers usually do not cause allergies.In most cases where the allergic disease is associated with roses and other flowering flowers, actually it is caused by the pollen of closely spaced grasses and trees.Allergy to the flowers rarely can develop in people who have close contact with them, for example, employees of greenhouses or flower shops.
sometimes cause allergic reactions of the oral cavity is the result of cross-reactions to pollen and certain foods.By itself, the reaction of the oral cavity appears swelling, itching areas of the mouth in contact with food - lips, tongue, throat, palate.Suffering from such a reaction should not, eat raw foods, especially during the season of flowering plants, the pollen that causes allergies them.If you have an allergy to birch pollen is not recommended to eat apples, pears, celery, carrots, potatoes, kiwis, hazelnuts;if you are allergic to ragweed pollen is not recommended, there are watermelons, melons, cucumbers;if you are allergic to tree pollen and grass are not recommended to eat apples, peaches, oranges, pears, cherries, tomatoes, carrots, hazelnuts, and so on. n. Usually, an allergy to the fruit of the tree pollen which shows signs of allergy, allergy does not develop.In general, to an allergic reaction to pollen, you need contact with it at least for one season flowering.