24 Jul, 2010 in
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Study Suggests Dogs, Cats, Dust Mites, Other Allergens May Increase Hypersensitivity to Ragweed By Katrina Woznicki Reviewed By
July 23, 2010 — People who possess hay fever as well as who as well as possess an allergy to cats, dogs, dust mites, or grass pollen possess hay fever symptoms that are more very bad as well as occur earlier on, according to a recent study. Hay fever season occurs in unhurried summer when ragweed is in filled bloom. But, not everyone allergic to ragweed experiences symptoms at the alike time or in the alike way. An estimated 36 million Americans possess seasonal allergies. Ragweed is a plant that can grow anywhere; it is ordinary throughout the Northeast, but it as well as grows in the South as well as Midwest as well as is a major cause of late-summer as well as fall allergy symptoms. People allergic to ragweed experience itchy eyes, runny noses, as well as sneezing. Allergy Study ResultsTo evaluate who develops hay fever symptoms as well as when, researchers from Kingston Common Hospital in Ontario, Canada, studied 123 people who were allergic to ragweed. The participants underwent skin prick tests to determine who was as well as allergic to combined grasses, combined trees, certain molds, pets, pollen, as well as dust mites. Two-thirds of the group tested positive for cat allergies, 63% tested positive for dog allergies, as well as 73% tested positive for dust mite allergies. Participants were then exposed to ragweed for three hours as well as asked to record their symptoms every 30 minutes. “On average, those who tested positive for cat, dog, or dust mite allergies developed symptoms either faster than, or to a greater degree than those who tested negative for those allergies,” says allergist as well as study researcher Anne K. Ellis, MD. “The differences seen at 90 minutes of exposure were less dramatic after three hours of exposure, but. That suggests that once the hay fever season is in filled swing, the symptom differences between those with cat, dog, or dust mite allergies as well as those without no longer exist.” The findings suggest that year-round allergies to dogs, cats, as well as dust mites may pre-prime the immune system, increasing a person’s sensitivity to other allergens, such as ragweed. The results are published in a recent issue of Annals of Allergy, Asthma & Immunology. The researchers suggest that intense reactions to ragweed may be reduced by limiting exposure to other allergens before ragweed season begins. Allergy immunizations may as well as be an option, they say, as well as may make hay fever season more tolerable. SOURCES: News release, International Association of Physicians in AIDS Care. |
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