RESPIRATORY ALLERGIES
Definition:
These are allergies that allergens come into contact with the body primarily through breathing the air.
Cause:
Seasonal allergies are usually caused by pollen and then occur in those periods of the year in which the plants bloom. Chronic allergies are mostly caused by allergens that enter into daily contact, such as animal hair, dust or feathers. Usually there is a familial predisposition.
Types of allergy respiratoia
Respiratory allergies can be caused by a wide range of substances called allergens that may, in the first instance, be brought to 4 key groups: the pollen, so-called dust mites, derivatives epithelial Animal molds.
By definition the pollen allergy which can lead anemofili those are the ones who exploit the wind to fertilize other plants and therefore differ from those entomofili that exploit the insects ..
In the pollen season there are the blooms of different types of plants that determine the appearance of characteristic symptoms (rhinitis, conjunctivitis, cough, dyspnea or air hunger, asthma) in well-defined periods: it is very important to know allergologi period in which the symptoms appeared to be able to connect, given the results of allergy skin tests, with a single pianta.Un allergologi will never accept a vague identification of the period of "spring" or "when the heat" but need to know with reasonable certainty the month in which the symptoms were present. (To see the flowering period of the main plant in Italy click here). Also because the evidence of an allergic show usually a polisensibilizzazione (ie, positivity to different allergens) that might mislead.
Among the first plants to bloom in the Pianura Padana certainly the group of Betullacee and Corilacee, which can bring the same Birch, Hazel and the Ontano. These three plants from an allergen point of view, ie substances that give the 'allergy, are regarded as overlapping. There is a small difference in the periods of flowering, which may be in the month of January for Hazel, February, March and early April for the Birch
Subsequently appear pollens of Gramineae beginning to end in April and June. Usually, we went September to a new period of pollination. The Gramineae by an allergen point of view are all overlapping with each other, except the 'Dog that grass allergenic own characteristics, which are tested individually.
The Pellitory, once typical of the coasts and islands, and now well represented in the Pianura Padana, blooms from mid May to July, then lost those characteristics of perennial allergen that has in other regions such as Campania.
L 'Olivo in the Po Valley is typical of the region of Lake Garda, in the rest d' Italia on the coasts. Flowering period May-June.
For nearly 15 years is becoming increasingly important l 'Ambrosia, a plant imported from the U.S. starting with the beginning of'900 and has found a favorable habitat in Sydney in the area of Legnano, Magenta and Busto Arsizio. Flowering August - September
Another emerging family of plant is certainly one of Cupressacee, until a few years ago not much considered allergenic. Flowering from January to April - May
The dust mites
Dermatophagoides pteronyssinus is the origin of the most potent allergen that causes asthma. It fits very well to life in our homes, staying mainly in the bed and feeds on the flakes of human skin lost with the physiological desquamation. The Acari derived from the liquid for which the moisture in the atmosphere is essential for their proliferation. The ideal habitat is given by a humidity around 80% and a temperature of 25 ° C. In the mountain air above 1400 meters of altitude, their presence is more sporadic, probably due to a reduction of moisture and temperature. Have dimensions around 0.3 mm and their faeces have sizes around 20 thousandths of a millimeter and are therefore suitable to be inhaled deeply into the nose and lungs.
The Pets
Are now among the leading causes of allergic reactions. Why could go off the allergy is not necessary the presence of the animal. Allergens are present in the air and in house dust, if the cat even after much of the time against deportation. Cat allergens are the saliva, and hair covers it when the animal licks and the hair itself is not allergenic. Dog allergens are the skin, in hair and saliva.
The Molds
They are part of the kingdom fungi, are very adaptable and can grow anywhere there is sufficient moisture and oxygen. Are formed by a long filament that grows on the surface of organic materials such as decomposing plant residues or fruit and cheese rotting. Trigger respiratory allergic reactions usually in autumn when the spores of Aspergillus fumigatus and Alternaria are present in 'the atmosphere in large quantities. The spores of Cladosporium herbarum reach high values in spring-summer and mold colonises herbal substances and in particular the 'grass. It can also be found in 'home environment, for example on fruit, in humidifiers and moisture stains on the walls
Cockroaches
In cities, the attacks of allergic asthma are caused by 23 to 60 per cent of cases by the beetles. Their feces are lost in the form of powder and contain a digestive protein, which is a powerful allergen if inhaled triggers in people sensitive allergic rhinitis and severe asthma attacks. Most of the homes of the city, especially downtown and in apartment blocks, home to colonies of cockroaches
Cross reactions between inhaled and food allergens
Patients allergic to pollens may complain about the appearance, usually in the period of pollination, symptoms such as swelling of the lips and mouth accompanied by intense itching, after eating fruit or vegetables. This can be explained by the presence of common allergens in these pollens and foods: this disease is called Oral Allergic Syndrome, affecting approximately 25% of patients pollinosici. The symptoms can be up all'edema of the glottis resulting in difficulty breathing. Patients should, therefore, cautiously, to avoid the intake of foods suspected to cross-react with pollen to which the subject is allergic.
Betullacee
-banana
-apple
-fennel
-plum
-almond
-carrot
-celery
-medlar
-pear
-hazelnut
-potato
-peach
-raspberry parsley
-walnut
-apricot
- cherry
-strawberry
-kiwi
Gramineae
-wheat
-melon
-tomato
-watermelon
-kiwi
-peach
-apricot
-cherry
-plum
-almond
-citrus
Composite
-celery
-melon
-watermelon
-apple
-banana
-pumpkin
-camomile
-chicory
-dandelion
-chestnut
-fennel
-parsley
-oil
-sunflower
-margarine
-honey
Pellitory
-mulberry
-peas
-melon
-basil
-cherry
-nettle
Lattice
-Ray
-banana
-kiwi
-peach
-fig
-raisin
-plum
-cherry
-pineapple
-peanut
-tomato
-hazelnut
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