Cause of allergies
Allergies can develop at any age, even in the womb. They most commonly occur in kids , but can cause symptoms for the first time in adulthood. Asthma may persist in adults while nasal allergies tend to decline in old age. Why, you ask, some sensitive to certain allergens, while most are not? Why allergic people produce more IgE than those who are non-allergic? The main distinguishing factor seems to be heredity. For some time, it is known that allergic conditions tend to cluster in families. Your own chances of developing allergies is related to the history of allergy to your parents. If neither parent is allergic, the chance that you have allergies is about 15%. If one parent is allergic, your risk increases to 30% and if both are allergic, the risk is greater than 60%.
Other environmental factors
International differences could be associated with the number of individuals in a population suffering from allergies. Allergic diseases are more common in industrialized countries than in countries that are more traditional, agriculture, and there is a higher rate of allergic diseases in urban than in rural populations, although these differences are less defined. Allergen exposure, especially early in life, is a major risk factor for allergy. Changes in exposure to microorganisms is a plausible explanation, at present, the increase in atopic allergy. exposure to endotoxin reduces the release of inflammatory cytokines such as TNF-α, IFN, IL-10 and interleukin-12 white blood cells (leukocytes) circulating in the blood. Some microbes detection of proteins, called Toll-like receptors located on the surface of cells in the body are also suspected of involvement in these processes.
Other environmental factors
International differences could be associated with the number of individuals in a population suffering from allergies. Allergic diseases are more common in industrialized countries than in countries that are more traditional, agriculture, and there is a higher rate of allergic diseases in urban than in rural populations, although these differences are less defined. Allergen exposure, especially early in life, is a major risk factor for allergy. Changes in exposure to microorganisms is a plausible explanation, at present, the increase in atopic allergy. exposure to endotoxin reduces the release of inflammatory cytokines such as TNF-α, IFN, IL-10 and interleukin-12 white blood cells (leukocytes) circulating in the blood. Some microbes detection of proteins, called Toll-like receptors located on the surface of cells in the body are also suspected of involvement in these processes.
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