hay fever

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Related to Pollen allergy: hay fever

hay fever,

seasonal allergyallergy,
hypersensitive reaction of the body tissues of certain individuals to certain substances that, in similar amounts and circumstances, are innocuous to other persons. Allergens, or allergy-causing substances, can be airborne substances (e.g.
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 causing inflammation of the mucous membranes of the nose and eyes. It is characterized by itching about the eyes and nose, sneezing, a profuse watery nasal discharge, and tearing of the eyes. The cause is a sensitivity to one or more species of pollens or fungi. In addition, many patients with hay fever develop other allergic conditions, e.g., asthmaasthma
, chronic inflammatory respiratory disease characterized by periodic attacks of wheezing, shortness of breath, and a tight feeling in the chest. A cough producing sticky mucus is symptomatic.
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 and sinusitis. In the spring, hay fever may be caused by tree pollens (oak, elm, maple); in summer, by grass pollens, wheat or corn rusts, or fungus spores; in late summer and fall, by ragweed pollen, which is the most common cause. Temporary relief of symptoms may be obtained from antihistamines and decongestants, such as ephedrine. Physicians may resort to corticosteroids in severe cases. Sometimes desensitization measures are taken, consisting of repeated injections of small amounts of the allergen (pollen) until its presence produces no symptoms; however, the treatment must be continued from year to year, since immunity is not permanent. Some relief can be obtained by removing pollen from the air by air conditioners and filters.

Hay Fever

 

an allergic disorder in man, caused by sensitivity to the pollen of certain plant species. Hay fever belongs to the group of pollinoses. The disorder appears during the flowering of grasses and trees. Pollinoses may be spring, summer, or autumn reactions, depending on individual sensitivity to a certain species of pollen and on the time of flowering of the offending plant. Clinical manifestations include irritation of the mucous membranes of the nose and eyes and, less frequently, attacks of asthma. Treatment involves specific desensitization between attacks and the use of such symptomatic preparations as ephed-rine, Adrenalin, and antihistamine preparations during the allergy season. Prophylaxis includes changing the place of residence during the hay-fever season and other means of avoiding contact with the allergen.

hay fever

[′hā ‚fē·vər]
(medicine)
An allergic disorder of the nasal membranes and related structures due to sensitization by certain plant pollens. Also known as allergic rhinitis; pollinosis.

hay fever

an allergic reaction to pollen, dust, etc., characterized by sneezing, runny nose, and watery eyes due to inflammation of the mucous membranes of the eyes and nose
References in periodicals archive ?
Earlier, the PIMS administration had urged the pollen-sensitive residents to come for check up before onset of the the pollen allergy season.
He said that there must be awareness camping regarding pollen allergy so that maximum patients could be cured.
As many as 40 beds reserved for pollen allergy patients in Pims of them 20 beds extra are in new emergency for pollen allergy patients.
The report reviews pipeline therapeutics for Birch Pollen Allergy by companies and universities/research institutes based on information derived from company and industry-specific sources
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Data Source: A multicenter, randomized, placebo-controlled study that initially enrolled 633 adult patients with grass pollen allergy.
Estimates of the percentage of patients with pollen allergy who also suffer from PFS vary from 47% to 70%, and this is thought to be the most common food allergy in adolescents and adults.
Although the effect of sublingual immunotherapy is relatively easy to assess in pollen allergy, which has a fixed, seasonal occurrence, its effect on year-round dust mite allergy has been more difficult to assess, added Giovanni Passalacqua, M.
Using a DNA vaccine on humans to treat pollen allergy is not yet permitted in Japan.
But a person with a pollen allergy could be sniffling in misery the day after a rainstorm because pollen swells with moisture, ruptures and spews microscopic pollen granules that are more easily inhaled into the airways, Guerra said.
Metcalfe, you might be genetically predisposed to a birch pollen allergy.
Pollen allergy is commonly known as "hay fever," a misnomer that came about because the sniffling, sneezing, and itchy eyes flare up most often in late summer, about the time hay is harvested.