New PDF release: Airborne allergens : something in the air

By National Institute of Allergy and Infectious Diseases (U.S.)

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It has few side effects when used as directed and significantly helps some people manage their allergies. Decongestants Sometimes helping the nasal passages to drain away mucus will help relieve symptoms such as congestion, swelling, excess secretions, and discomfort in the sinus areas that can be caused by nasal allergies. Your doctor may recommend using oral or nasal decongestants to reduce congestion along with an antihistamine to control allergic symptoms. 26 09-0247 Airborn 14ƒ 4/30/03 10:11 AM Page 33 You should not, however, use over-the-counter or prescription decongestant nose drops and sprays for more than a few days.

These injections reduce the level of IgE antibodies in the blood and cause the body to make a protective antibody called IgG. About 85 percent of people with allergic rhinitis will see their hay fever symptoms and need for medicines drop significantly within 12 months of starting immunotherapy. Those who benefit from allergy shots may continue it for 3 years and then consider stopping. While many are able to stop the injections with good results lasting for several years, others do get worse after the shots are stopped.

Scientists must now figure out how pet exposure causes a general shift of the immune system away from an allergic response. The results of this and a number of other studies suggest that bacteria carried by pets may be responsible for holding back the immune system's allergic response. These bacteria release molecules called endotoxin. Some researchers think endotoxin is the molecule responsible for shifting the developing immune system away from responding to allergens through a class of lymphocytes called Th-2 cells.

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Airborne allergens : something in the air by National Institute of Allergy and Infectious Diseases (U.S.)

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