Causes of allergies


CAUSES OF ALLERGIES

FOOD ALLERGENS
One of the  common food allergy is a peanuts sensitivity . Peanut allergies can be extremely serious, but sometimes can be overwhelmed by school children. Nuts, including pecans, pistachios, pine nuts and walnuts, is another common allergen. People can be sensitive to one or more of the nuts. Also seeds including sesame seeds and poppy seeds, contain oils that the protein is present, which may cause allergic reaction. egg allergies affect about one child in fifty, but they are often overwhelmed by the children when they reach the age of five years. In general, the sensitivity of the protein in yellow instead of white. Milk, cow, goat or sheep, is another common food allergens, and many patients can not tolerate dairy products like cheese. A small proportion of children who are allergic to milk, about ten percent, will be a reaction to beef. Meat contains a small amount of protein present in cow's milk.

Other foods that contain allergenic proteins are soy, wheat, fish, shellfish, fruits, vegetables, spices, natural and synthetic colors, additives and chemicals.

Non-food protein allergens
Latex can trigger a skin reaction mediated by IgE, respiratory and systemic. The prevalence of latex allergy in the general population is estimated at less than one percent. In a hospital-based study, one in 800 surgical patients (0.125 percent) compared with latex sensitivity, although sensitivity among health workers is greater, between seven and ten percent. The researchers attribute this increase to the exposure of health workers in areas of major latex allergens in the air, such as operating rooms, intensive care units and dental clinics. These environments rich in latex can educate health workers regularly inhaled allergenic proteins.


Toxins interacting with proteins
Another response of non-protein food, urushiol-induced contact dermatitis, strains after contact with poison ivy, poison ivy East, poison ivy or poison sumac West. The urushiol, which is not itself a protein that acts as a hapten and chemically reacts with, binds and modifies the form of an integral membrane protein on cells exposed skin. The immune system does not recognize the affected cells as normal parts of the body, causing an immune T cell response. These poisonous plants, ivy is the most virulent. The skin reaction resulting from the reaction between the urushiol and membrane proteins include redness, swelling, papules, vesicles, blisters and scratches.

Genetic basis
Genetic basis of allergic diseases are strongly hereditary identical twins are likely to be allergic to the same diseases for about 70% of the time, the same allergy occurs in approximately 40% of the time of non-identical twins. Allergic parents are more likely to be allergic children and their allergies may be more stringent than non-allergic parents. Some allergies are not consistent along genealogies, parents who are allergic to peanuts may be children who are allergic to Ragweed. It seems that the likelihood of developing allergies is hereditary and is linked to irregularities in the immune system, but no specific allergen.

Hygiene hypothesis
The hygiene hypothesis has been developed to explain the fact that hay fever and eczema, allergic diseases were less common among children in big families, who were probably more exposed to infectious agents through their brothers and sisters, children from families with one child. The hygiene hypothesis has been carefully studied by immunologists and epidemiologists and has been an important theoretical framework for the study of allergic disorders. It is used to explain the increase in allergic diseases has been seen since industrialization, and the higher incidence of allergic diseases in more developed countries. The hygiene hypothesis has now been expanded to include exposure to symbiotic bacteria and parasites as modulators of important immune system development, as well as infectious agents.



No comments:

Post a Comment