(n.) The fecundating dustlike cells of the anthers of flowers. See Flower, and Illust. of Filament.
Example Sentences:
(1) We conclude that the priming effect is not a clinically significant phenomenon during natural pollen exposure in allergic rhinitis patients.
(2) The diagnosis of occupational allergy was based on history, skin prick tests and RAST to the pollen.
(3) Using a large clinic population with adequate controls, significant correlation between ragweed, grass or tree pollen sensitivity and the dates of birth was not obtained.
(4) For pollen asthma, six studies conclude that there were superior results with desensitization than to placebo.
(5) They were placed less than 5 m apart, and estimation of the pollen amount was made on a day-to-day basis during the pollen seasons, and on a weekly basis outside the seasons.
(6) The impact of pollen on the respiratory mucosa was modeled by studying the process by which solutes are eluted from pollen grains.
(7) One part fresh pollen grains is uniformly mixed with nine parts of the solution and left at room temperature for at least 5 hr.
(8) We have developed a reverse-type sandwich ELISA for measurement of IgG (+IgA) antibody to a major allergen of Sugi (Japanese cedar) pollens.
(9) The concentration of these pollens decrease in April, completely diminishing in May.
(10) Six atopic subjects with grass pollen allergy and six nonallergic healthy volunteers were enrolled into this study.
(11) Inhalant allergens as mite house dust, animal danders, pollens, molds and food allergens are considered, now, to be the most sensitizing agents.
(12) Most patients showed several positive skin tests to common allergens particular to grass pollen, house dust and mites (Dermatophagoides pteronyssimus).
(13) The pollen sterility (up to 30% of grains) is due to the abortive spore development.
(14) A pollen-specific cDNA clone, Zmc13, has been isolated from a cDNA library constructed to poly(A) RNA from mature maize pollen.
(15) Sixty patients with seasonal allergic rhinitis due to birch pollen were enrolled in an open, randomized parallel group study.
(16) We have studied some aspects of the atopic syndrome in this population of Southern Italy: frequency of allergic sensitization according to endogenous and extrinsic factors (particularly Parietaria officinalis, a characteristic pollen of the Southern Italian Flora), etc.
(17) It was observed that cocksfoot pollen extract is stable but there appears a slight but significant (P less than 0.05) decay in activity when the extract stored for up to 6 months was compared with a freshly prepared extract.
(18) These are collected in her pollen baskets which she takes back to the nest to feed the young after fertilising the flowers.
(19) It was observed, perhaps for the first time, that feeling worse when there is a high pollen count appears to be associated with the symptom pattern seen in winter SAD patients.
(20) In allergologic out-patient departments of Dubrovnik, Split, Sibenik, Zadar, Pula and Rijeka, 300 patients with pollinosis have been tested by the application of the prick method of group allergens of grass, tree and weed pollen, particularly of Parietariae (pellitory) pollen.
Ragweed
Definition:
(n.) A common American composite weed (Ambrosia artemisiaefolia) with finely divided leaves; hogweed.
Example Sentences:
(1) Using a large clinic population with adequate controls, significant correlation between ragweed, grass or tree pollen sensitivity and the dates of birth was not obtained.
(2) Twelve non-atopic and 27 atopic preschool children were studied to determine the effect of pertussis booster vaccination on cutaneous histamine sensitivity and IgE antibody response to the naturally-occurring ragweed aeroallergen.
(3) We particularly wished to analyze the impact of terbutaline on the late allergic reaction, but we found that terbutaline mixed with ragweed antigen does not affect either the immediate or late skin test reaction.
(4) This ratio was related significantly to symptom scores reported by patients during the ragweed season subsequent to immunotherapy.
(5) Thus, with the dosage used, the parenterally administered hyperimmune gamma globulin did not influence most measurements of ragweed hypersensitivity.
(6) Significant differences were also observed in symptom scores for individual weeks during the ragweed season.
(7) The stability of ragweed extracts as measured by Antigen E content is markedly enhanced with little loss after 15 month storage at 4 degrees C, when the extract is prepared as an alum precipitated suspension.
(8) The radioallergosorbent test was compared with currently accepted allergy diagnostic techniques in ragweed-sensitive and unselected patients.
(9) The first group was given immune sera (I) containing anti-ragweed IgE.
(10) To accomplish this, blood was obtained from patients with ragweed AR, granulocytes were isolated and fractionated by continuous density Percoll gradients, and the density distribution of these cells was determined after centrifugation.
(11) The 3 monoclonal antibodies studied recognized different components of timothy grass and 2 of them recognized kentucky june grass but none recognized components of ragweed extracts.
(12) Sixty ragweed-sensitive adults were randomized either to a course of four Pollinex-R hyposensitization injections during the 6 weeks before the ragweed-pollen season, or to budesonide aqueous nasal steroid spray, 400 micrograms daily, throughout the season.
(13) Furthermore, an additional 7 patients with ragweed-allergic rhinitis were studied prospectively while undergoing immunotherapy and Ab2 levels were found to increase with time posttreatment.
(14) We analyzed histamine, prostaglandin D2, IL-1, and leukocytes accumulating hourly for 12 hours at skin-chamber sites after local ragweed challenge in eight allergic subjects with cutaneous late-phase reactions.
(15) V (Ra5S), was isolated in ultrapure form from a 16-min extract of ragweed pollen by a combination of molecular sieving through an Amicon hollow fiber cartridge (H1P5), cation-exchange chromatography, and gel filtration.
(16) Previous work has demonstrated a close association between certain histocompatibility antigens and the gene that controls the IgE response to certain ragweed allergens.
(17) Astemizole (Hismanal; Janssen Pharmaceutica Inc., Mississauga, Ontario, Canada) and terfenadine (Seldane; Merrell Dow Pharmaceuticals [Canada], Inc., Concord, Ontario, Canada) were compared for clinical efficacy in a double-blind randomized trial during the ragweed pollen season.
(18) Seasonal changes in IgE antibodies and their relationship to IgG antibodies were studied in 52 patients with ragweed hay fever and 10 normal controls.
(19) In an attempt to differentiate between these two possible mechanisms, we obtained measurements of hemodynamics, respiratory mechanics, and O2 consumption (VO2) in nine asymptomatic adult ragweed asthmatics before and after inhalation challenge with either ragweed extract or methacholine.
(20) Total secretory IgA and specific anti-antigen E (AgE) antibodies (ab) in the IgA and IgG classes were measured in concentrated nasal washings from ragweed allergic and normal individuals by antigen binding or anti-alpha-radioimmunoassays.