Reseau National de Surveillance Aerobiologique

Sainte-Foy-lès-Lyon, France

Reseau National de Surveillance Aerobiologique

Sainte-Foy-lès-Lyon, France

Time filter

Source Type

Hamaoui-Laguel L.,CEA Saclay Nuclear Research Center | Hamaoui-Laguel L.,INERIS | Vautard R.,CEA Saclay Nuclear Research Center | Liu L.,International Center for Theoretical Physics | And 11 more authors.
Nature Climate Change | Year: 2015

Common ragweed (Ambrosia artemisiifolia) is an invasive alien species in Europe producing pollen that causes severe allergic disease in susceptible individuals. Ragweed plants could further invade European land with climate and land-use changes. However, airborne pollen evolution depends not only on plant invasion, but also on pollen production, release and atmospheric dispersion changes. To predict the effect of climate and land-use changes on airborne pollen concentrations, we used two comprehensive modelling frameworks accounting for all these factors under high-end and moderate climate and land-use change scenarios. We estimate that by 2050 airborne ragweed pollen concentrations will be about 4 times higher than they are now, with a range of uncertainty from 2 to 12 largely depending on the seed dispersal rate assumptions. About a third of the airborne pollen increase is due to on-going seed dispersal, irrespective of climate change. The remaining two-thirds are related to climate and land-use changes that will extend ragweed habitat suitability in northern and eastern Europe and increase pollen production in established ragweed areas owing to increasing CO 2. Therefore, climate change and ragweed seed dispersal in current and future suitable areas will increase airborne pollen concentrations, which may consequently heighten the incidence and prevalence of ragweed allergy. © 2015 Macmillan Publishers Limited.


Ziello C.,TU Munich | Sparks T.H.,TU Munich | Sparks T.H.,University of Life Sciences in Poznań | Estrella N.,TU Munich | And 25 more authors.
PLoS ONE | Year: 2012

A progressive global increase in the burden of allergic diseases has affected the industrialized world over the last half century and has been reported in the literature. The clinical evidence reveals a general increase in both incidence and prevalence of respiratory diseases, such as allergic rhinitis (common hay fever) and asthma. Such phenomena may be related not only to air pollution and changes in lifestyle, but also to an actual increase in airborne quantities of allergenic pollen. Experimental enhancements of carbon dioxide (CO2) have demonstrated changes in pollen amount and allergenicity, but this has rarely been shown in the wider environment. The present analysis of a continental-scale pollen data set reveals an increasing trend in the yearly amount of airborne pollen for many taxa in Europe, which is more pronounced in urban than semi-rural/rural areas. Climate change may contribute to these changes, however increased temperatures do not appear to be a major influencing factor. Instead, we suggest the anthropogenic rise of atmospheric CO2 levels may be influential. © 2012 Ziello et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Thibaudon M.,Reseau national de surveillance aerobiologique | Thibaudon M.,University of Strasbourg | Sauleau E.-A.,Groupe methodologique de recherche clinique | Sauleau E.-A.,University of Strasbourg | And 10 more authors.
Revue Francaise d'Allergologie | Year: 2014

An increase in respiratory diseases during stormy summer periods has been noted for many years. The purpose of this study, besides a literature search, was to relate different aerobiological parameters (concentrations of molds and pollens), weather (temperature, relative humidity, rainfall and storms), and air pollution (PM10, PM2,5, O3, NO2...) to hospitalizations based on emergency department data or "SOS médecins" calls for serious respiratory problems. The current study was carried out in the summer seasons from 2008 to 2013 with the help of the personal of the Pulmonary and Allergy department, the Division of Public Health and the Emergency Department of the Strasbourg University Hospital, "SOS médecins" in Strasbourg, as well as the RNSA (Réseau national de surveillance aérobiologique), the ASPA Alsace, Météo-France and Météorage. Among aerobiological parameters, a sharp increase in concentrations of Didymella sp. was observed during stormy periods. These periods also favor occasional increase in respiratory diseases. © 2014 Elsevier Masson SAS.


Cuny M.-A.,Association Pour la Prevention de la Pollution Atmospherique | Verrougstraete L.,Association Pour la Prevention de la Pollution Atmospherique | Thibaudon M.,Reseau National de Surveillance Aerobiologique | Bonheme L.,Reseau National de Surveillance Aerobiologique | And 2 more authors.
Environnement, Risques et Sante | Year: 2015

Cities concentrate multitudinous sources of air pollution. The surfaces and layouts of both buildings and streets contribute to urban heat islands. Air pollution and heat have deleterious health effects. It is necessary to rethink today's city to offer its inhabitants a healthy and sustainable environment. Vegetation is an essential part of the strategy developed towards this goal. It also has disadvantages, however, and its use cannot be improvised. The main objectives of this article, which relies on recent studies, is to provide an update on the effects of city vegetation on urban climate, air pollution and health, but also to show the limitations of these studies in providing recommendations for change. Thus, vegetation helps to reduce urban heat island effects and, to a lesser extent, to capture some pollutants. The studies, however, are often based on models and are difficult to transpose. Diversified vegetation offers the greatest environmental and health benefits, although care must be taken concerning the allergenic potential of new plantings. Copyright © 2015 JOHN LIBBEY EUROTEXT.


Sicard P.,ACRI ST | Thibaudon M.,Reseau National de Surveillance Aerobiologique | Besancenot J.-P.,Reseau National de Surveillance Aerobiologique | Mangin A.,ACRI ST
Grana | Year: 2012

The olive tree, Olea europaea, is very common in the southeast of France and its pollen is recognised as one of the most important allergenic in the Mediterranean. This study allowed for the development of predictive models to calculate the main characteristics of the Olea pollen season over the last 20 years from a wide range of meteorological variables. Clear evidence of the relationship between the main features of the Olea pollen season and the temperature recorded during the months before the flowering period could be demonstrated. The mean temperature in February plays an important role in determining reproductive growth and anthesis. It seems that the mean temperature during autumn influences the pollen index of the next year's pollen season. Other environmental factors, such as global radiation and rainfall, may be of great influence in determining the onset and final date of pollination. The accumulated rainfall amount during the pollination period has a negative effect on the pollen index. This may be interpreted as the wash out of airborne pollen by raindrops. However, rainfall during the vegetative period has a positive effect on pollen production. The pollen quantities depend not only on meteorological conditions before pollen release, but also maybe on those prevailing during pollen release. Finally, we could demonstrate an upward trend in annual pollen production and a stability of the mean duration of the Olea pollen season. The increase in Olea pollen abundance coincides with a rise in air temperature over the last 20 years. © 2012 Copyright 2012 Collegium Palynologicum Scandinavicum.


Sindt C.,Reseau National de Surveillance Aerobiologique | Besancenot J.-P.,Reseau National de Surveillance Aerobiologique | Thibaudon M.,Reseau National de Surveillance Aerobiologique
Aerobiologia | Year: 2016

Fungal spores are among the most commonly encountered airborne biological particles, and it is widely proved that they represent a potential source of allergens involved in rhinitis and asthma. A change in temperature may influence the colonisation and growth of fungi directly through the physiology of individual organisms, or indirectly through physiological effects on their host plants or substrates and any competitors or enemies. In order to detect and monitor the evolution of the spore counts, air sampling was carried out using standard equipment (Hirst-type volumetric traps) and an identical method in several stations across France. Cladosporium has been here emphasised because of its very large contribution to the total fungal spectrum. Moreover, this taxon is of particular clinical importance because it possesses a high allergenic potential. The data from the oldest traps (Aix-en-Provence, Bordeaux, Lyon, Paris and Toulouse) were analysed on an annual base. Located at different latitudes and in different climatic areas, these five cities showed fundamentally different trends for the concentrations of Cladosporium spores: downward trend at the southernmost locations and upward trend at the other locations, whereas temperature was everywhere continuously rising over the study period. However, longer data sets are needed to be able to draw more definitive conclusions about quantitative trends in airborne fungal spore concentrations. © 2016, Springer Science+Business Media Dordrecht.


Besancenot J.-P.,Reseau national de surveillance aerobiologique | Thibaudon M.,Reseau national de surveillance aerobiologique
Revue des Maladies Respiratoires | Year: 2012

There is growing evidence to support an increase in air temperature over recent decades, with significant effects on aeroallergens such as pollen. It is generally accepted that the trend will continue, and become even more pronounced in the future. © 2012 SPLF. © 2012 Publié par Elsevier Masson SAS pour la SPLF.


Thibaudon M.,Reseau National de Surveillance Aerobiologique | Thibaudon M.,Groupe de Travail Aerobiologie de la Societe Francaise dAllergologie | Caillaud D.,Groupe de Travail Aerobiologie de la Societe Francaise dAllergologie | Besancenot J.-P.,Reseau National de Surveillance Aerobiologique | Besancenot J.-P.,Groupe de Travail Aerobiologie de la Societe Francaise dAllergologie
Revue des Maladies Respiratoires | Year: 2013

Introduction.- Pollen is a major cause of allergy and monitoring pollen in the air is relevant for diagnosis, treatment and prevention, as well as for biomedical and biological research. Many aero-biological studies have been conducted all over the world to ascertain aerial concentrations and seasonality of pollen grains. Background.- Monitoring of airborne biological particles is carried out by various gravimetric, impaction, and suction sampling devices. The Hirst trap, later modified to Burkard® or Lanzoni® traps, is the most widely used sampler. Counting and identifying pollen grains is then performed under optical microscopy. Based on differences in airborne pollen recorded over several years of observation, pollen calendars have been drawn up as aids to allergy diagnosis and managementbut they could be replaced advantageously by allergy-risk calendars. Pollen counts also provide valuable information about the geographical origin of pollen grains. Viewpoints.- Since the identifying and counting of pollen grains in ambient air samples is still a demanding and time-consuming task, there is an increasing interest in the automation of pollen monitoring. Furthermore, the divergence sometimes observed between clinical observations and pollen counts provides an incentive to collect aero-allergens directly. Lastly, pollen monitoring could be improved through the use of personal bioaerosol samplers. Conclusions.- Great progress has been made in aerobiology for over a century, but muchremains to be accomplished, particularly in relation with the standardization of methods. © 2013 SPLF. Published by Elsevier Masson SAS. All rights reserved.


PubMed | Reseau national de surveillance aerobiologique
Type: Journal Article | Journal: Revue des maladies respiratoires | Year: 2013

Pollen is a major cause of allergy and monitoring pollen in the air is relevant for diagnosis, treatment and prevention, as well as for biomedical and biological research. Many aero-biological studies have been conducted all over the world to ascertain aerial concentrations and seasonality of pollen grains.Monitoring of airborne biological particles is carried out by various gravimetric, impaction, and suction sampling devices. The Hirst trap, later modified to Burkard() or Lanzoni() traps, is the most widely used sampler. Counting and identifying pollen grains is then performed under optical microscopy. Based on differences in airborne pollen recorded over several years of observation, pollen calendars have been drawn up as aids to allergy diagnosis and management but they could be replaced advantageously by allergy-risk calendars. Pollen counts also provide valuable information about the geographical origin of pollen grains.Since the identifying and counting of pollen grains in ambient air samples is still a demanding and time-consuming task, there is an increasing interest in the automation of pollen monitoring. Furthermore, the divergence sometimes observed between clinical observations and pollen counts provides an incentive to collect aero-allergens directly. Lastly, pollen monitoring could be improved through the use of personal bioaerosol samplers.Great progress has been made in aerobiology for over a century, but much remains to be accomplished, particularly in relation with the standardization of methods.

Loading Reseau National de Surveillance Aerobiologique collaborators
Loading Reseau National de Surveillance Aerobiologique collaborators