2 results on '"Sudre B"'
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2. High levels of grass pollen inside European dairy farms: a role for the allergy-protective effects of environment?
- Author
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Sudre , B., Vacheyrou , M., Braun-Fahrländer , C., Normand , A.-C., Waser , M., Reboux , G., Ruffaldi , P., Von Mutius , E., Piarroux , R., Renseigné , Non, Laboratoire Chrono-environnement ( LCE ), Université Bourgogne Franche-Comté ( UBFC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), European Project : 211911,EC:FP7:KBBE,FP7-KBBE-2007-1,EFRAIM ( 2008 ), University of Zurich, Sudre, B, Laboratoire Chrono-environnement (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), European Project: 211911,EC:FP7:KBBE,FP7-KBBE-2007-1,EFRAIM(2008), and Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE)
- Subjects
Allergy ,MESH: Air Pollutants ,Microorganism ,MESH: Dairying ,Pilot Projects ,medicine.disease_cause ,MESH : Agriculture ,Pasture ,0302 clinical medicine ,Allergen ,Immunology and Allergy ,[SDV.MP.MYC]Life Sciences [q-bio]/Microbiology and Parasitology/Mycology ,MESH : Allergens ,[ SDV.MP.MYC ] Life Sciences [q-bio]/Microbiology and Parasitology/Mycology ,2. Zero hunger ,Air Pollutants ,0303 health sciences ,geography.geographical_feature_category ,MESH : Pilot Projects ,food and beverages ,Agriculture ,MESH : Environment ,Europe ,Dairying ,MESH : Air Pollution, Indoor ,Air Pollution, Indoor ,2723 Immunology and Allergy ,Pollen ,Livestock ,MESH: Agriculture ,MESH: Fungi ,MESH: Allergens ,MESH: Hypersensitivity ,Immunology ,MESH: Environmental Exposure ,MESH : Europe ,MESH : Air Pollutants ,610 Medicine & health ,Environment ,03 medical and health sciences ,Animal science ,Hypersensitivity ,medicine ,otorhinolaryngologic diseases ,Humans ,Poaceae ,MESH : Bacteria ,MESH : Pollen ,MESH: Environment ,MESH : Fungi ,030304 developmental biology ,geography ,2403 Immunology ,MESH: Humans ,MESH : Hypersensitivity ,Bacteria ,business.industry ,MESH : Humans ,Fungi ,Environmental Exposure ,Allergens ,Seasonality ,medicine.disease ,MESH: Pilot Projects ,MESH: Bacteria ,030228 respiratory system ,10036 Medical Clinic ,MESH: Pollen ,MESH : Dairying ,MESH: Europe ,MESH: Air Pollution, Indoor ,business ,MESH : Environmental Exposure - Abstract
International audience; BACKGROUND: There is evidence of an allergy protective effect in children raised on farm. It has been assumed that microbial exposure may confer this protection. However in farm, little attention has been given to the pollen level and to concomitant microbiological exposure, and indoor pollen concentrations have never been precisely quantified. METHODS: The kinetics of pollen in dairy farms have been studied in a pilot study (n = 9), and exposure in a sub-sample of the ongoing European birth cohort PASTURE (n = 106). Measurements of viable microorganisms and pollen were performed in air samples. To identify factors that modulate the pollen concentration multivariate regression analyses were run. RESULTS: Indoor pollen (95% of Poaceae fragments and grains) were significantly higher in winter than in summer (P = 0.001) and ranged between 858 to 11 265 counts/m(3) during feeding in winter, thus exceeding typical outdoor levels during the pollen season. Geometric mean in French farms was significantly higher than in German and Swiss farms (7 534, 992 and 1 079 count/m(3), respectively). The presence of a ventilation system and loose housing systems significantly reduced indoor pollen levels. This pollen concentration rise after feeding was accompanied by an increase in fungal and actinomycetal levels, whereas the concentration of bacteria was not associated with feeding. CONCLUSIONS: Farmers and their children who attend cowsheds during the feeding sessions are exposed perennially to high pollen concentrations. It might be speculated that the combined permanent exposure to microbes from livestock and grass pollen may initiate tolerance in children living on a farm.
- Published
- 2009
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