ragweed


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ragweed

(răg′wēd′)
n.
1. Any of various weeds of the genus Ambrosia of the composite family, having small, greenish, unisexual flower heads and producing abundant pollen that is one of the chief causes of hay fever.
2. Chiefly British Ragwort.

ragweed

[rag′wēd]
Etymology: ME, ragge, rag + AS, weod, herb, grass, weed
any of various species of plants of the genus Ambrosia whose pollen can cause hay fever.

ragweed

A plant of the family Compositae, the pollen from which is highly allergenic and the most common cause of allergic rhinitis.
 
Diagnosis
Bronchial provocation testing, in which pollen is inhaled through a dosimeter.
 
Management
Avoidance of pollens by staying indoors; use of cromolyn, antihistamines, sympathomimetics, theophylline and corticosteroids.

ragweed

Ambrosia artemisiifolia Allergy medicine Any of the weedy composite herbs of family Compositae, the pollen from which is highly allergenic Diagnosis Bronchial provocation testing, in which pollen is inhaled through a dosimeter Management Avoid pollen, stay indoors, cromolyn, antihistamines, sympathomimetics, theophylline, corticosteroids Drug slang A street term for low quality marijuana or heroin

ragweed,

n Latin names:
Ambrosia artemisifolia, Ambrosia trifida. An annual weed that blooms in the fall and is implicated as the primary cause of hay fever.

ragweed

see artemisia, a name sometimes used for senecio but more commonly ambrosia elatir, or Franseria discolor (white ragweed).
References in periodicals archive ?
Live where ragweed isn't: Each year there are various lists that rank some of the worst locations people can live if they have allergies.
During treatment for one ragweed pollen season, patients who received Ragwitek experienced approximately a 26 percent reduction in symptoms and the need for medications compared to those who received a placebo.
Most of the companies have no plans to take SLIT beyond the standardized extracts, which means grass, ragweed, house dust mite, and cat.
Probably across the board, ragweed is the most common thing that people are sensitized to.
Similar results were demonstrated with all secondary endpoints: TCS during the 3 peak weeks of the short ragweed season 42% reduction compared to placebo (p=0.
Weed ecologist Emilie Regnier of Ohio State University in Columbus and her colleagues conducted field experiments to determine how exotic European night crawlers, Lumbricus terrestris, affected the survival of the seeds of Ambrosia trifida, giant ragweed.
The NRDC report concludes that an increasing number of the 110 million Americans who live in areas with existing ragweed problems will suffer the consequences of global warming as their noses begin to run and their eyes begin to water.
Best known for their electrifying live show, in 2004 Ragweed opened shows for ZZ Top, Lynyrd Skynyrd, Sammy Hagar, Jonny Lang, and Dierks Bentley, among others.
Subjects were exposed to ragweed pollen in an environmental exposure
The findings of the study, whatever they are taken to mean in immunological circles, nevertheless indicate that ragweed plants, like other autotrophs, perform substantially better under higher C[O.
In the case of pollen allergy, the antibody is specific for each type of pollen: one antibody may be produced to react against oak pollen and another against ragweed pollen, for example.