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Nasal challenge testing in grass pollen hay fever.

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Nasal sensitivity to rye grass pollen allergens was evaluated by provocation testing in patients with hay fever due to grass pollen using measurements of nasal airways resistance (NAR), a reproducible system for delivery of allergen, and stringent criteria for allergen storage. Reproducibility was

A new immunoperoxidase assay for Lolium perenne-specific IgE in serum based on the biotin/avidin system (BAS).

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A new solid-phase immunoassay based on the biotin/avidin system (BAS) for measuring serum Lolium perenne (LP)-specific IgE antibody is described. LP-specific IgE was assayed by the BAS assay and RAST for comparison in the sera of thirty-two normal asymptomatic subjects RAST-negative for LP and of

First report of field outbreaks of ergot-alkaloid toxicity in South Africa.

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Outbreaks of clinical disease caused by the ingestion of ergotized Lolium rigidum (annual ryegrass), which resulted in a substantial loss in production, have been reported. A number of outbreaks of a hyperthermia syndrome in cattle, characterized by severe loss in milk production, loss of body mass

In vitro synthesis of IgE by human peripheral blood leucocytes: VI. Seasonal variations in synthesis of rye pollen (Lolium perenne) specific IgE.

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Fractionation by Percoll density centrifugation of peripheral blood leucocyte cells, from atopic subjects with seasonal hay fever, unmasked IgE-B cell populations whose individual capacities to synthesize IgE in vitro were obscured in cultures of unfractionated B cells. B cell cultures from all six

Mapping of T cell epitopes of the major fraction of rye grass using peripheral blood mononuclear cells from atopics and non-atopics. II. Isoallergen clone 5A of Lolium perenne group I (Lol p I).

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Rye grass is the major cause of hay fever which currently affects 20% of the population. Lolium perenne group I (Lol p I) is a glycoprotein of 240 amino acid residues, representing the main allergen of rye grass. We have used peripheral blood mononuclear cells (PBMC) from controls and subjects

T cell epitopes of the major fraction of rye grass Lolium perenne (Lol p I) defined using overlapping peptides in vitro and in vivo. I. Isoallergen clone1A.

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One hundred and fifteen overlapping synthetic peptides spanning the entire sequence of the iso-allergen clone1A of Lol p I from rye grass Lolium perenne were synthesized by the multi-pin technique. The peptides were overlapping 12mers, offset by two residues and overlapping by 10 residues. Sets of

Is Lolium pollen from an urban environment more allergenic than rural pollen?

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BACKGROUND Allergy to grass pollen is a highly prevalent allergic disease. Hay fever is more predominant in urban than in rural areas, despite the increasingly smaller areas of surrounding grassland. The effect of vehicle exhaust pollutants, mainly diesel particles, and other industrial sources of

Ergot alkaloid intoxication in perennial ryegrass (Lolium perenne): an emerging animal health concern in Ireland?

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Four primary mycotoxicosis have been reported in livestock caused by fungal infections of grasses or cereals by members of the Clavicipitaceae family. Ergotism (generally associated with grasses, rye, triticale and other grains) and fescue toxicosis (associated with tall fescue grass, Festuca

[Identification of allergens in 5 grasses using crossed radioimmunoelectrophoresis (CRIE)].

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Using crossed radioimmunoelectrophoresis ( CRIE ) aqueous extracts from pollen of Phleum pratense , Lolium perenne, Poa pratensis , Festuca pratensis and Alopecurus pratensis were investigated for allergen composition. We detected between 24 and 32 antigens. Employing sera from 11 patients with well

Intranasal immunotherapy and polymerized grass pollen allergens.

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The effects of immunotherapy by intranasal insufflation of Lolium perenne allergens modified with glutaraldehyde (Glu-Rye) was tested by a stratified placebo-controlled trial in 16 adult subjects with hay fever. The purpose of this pilot study was to determine whether the treatment could reduce

Mycotoxicoses of ruminants and horses.

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In the current study, mycotoxicoses of ruminants and horses are reviewed, with an emphasis on the occurrence of these diseases in South America. The main mycotoxicoses observed in grazing cattle include intoxications by indole-diterpenoid mycotoxins (Paspalum spp. contaminated by Claviceps paspali,

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