Respiratory Alergie: All causes

For now you can not explain with precision the causes of this "mistake" of the immune system, while knowing how to happen, however, the mechanisms (described above) of allergizzazione you are still unable to establish with certainty who is at risk, who does not. One of the few things that doctors now know is that it is not equal for all time allergizzazione (time that elapses between the initial contact with the substance and the "unleashing" of symptoms): it is shown that this period can vary from just even a few days to several years! 

Equally well known is that there is a percentage of inheritance, ie it is found that 30% of children who have a parent who suffers from allergies may develop allergic phenomena of the same type even if they are in adulthood. 

Most important environmental factors: 

External factors 

1) environmental pollution certainly aggravates the allergic symptoms and increases the inflammatory response to exposure allergenic. 

2) ozone is able to determine the occurrence of various respiratory symptoms, functional deficits fans, bronchial hyperreactivity and bronchial flogosi (with neutrophil infiltration and release of leukotrienes). 

3) vehicular traffic between the various substances released by the spark ignition engines certainly particulate diesel has greater importance in allergology, as the small size for easy penetration in the small bronchi and induce an immune response to Th2 type. 

4) allergenic exposure: there is a clear correlation between degree of allergenic exposure and development of awareness, many studies have shown that high levels of allergen induce a high prevalence of subjects sensitized. In particular, high levels of mites and domestic animal derivatives are among the most important leaders of 'increase of epidemiological allergopatie. 

Internal factors 

1) Smoking tobacco: it is certainly considered the main factor to determine the development of allergy and respiratory symptoms. Tobacco smoke can act in several ways: direct perinalazione active or passive inhalation and also through the maternal-fetal exchange during pregnancy, among other tobacco smoke contains a protein that induces the synthesis of on 6. 

2) Domestic pollution: modern homes are characterized by thrusts of insulation measures that prevent the air and raise the humidity, conditions that favor the stagnation of the pollutants associated with gas cookers and smoking. 

3) household allergens is increasing the number of homes where pets are present (the persistence of cat allergens may persist for months!). 

4) Lifestyle more and more hours are spent in confined environments, which are polluting and high levels of allergens. 

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