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Red alert for ragweed allergy
Pollen season is a difficult time for many. In Europe, Ambrosia artemisiifolia L., a.k.a. common ragweed, could soon be adding to the plight of allergy sufferers, and many more people could develop symptoms. Climate change will enable this highly allergenic alien species to advance across the continent, say EU-funded researchers, who are calling for urgent action to keep the invader at bay.

Allergy to Ambrosia artemisiifolia L. — common ragweed — is likely to become a significant public health problem throughout Europe, according to the findings of the Atopica project. The expected changes in climate and land use will help this invasive alien species to spread, says project coordinator Michelle Epstein of the Medical University of Vienna.
As ragweed produces highly allergenic pollen, this development would translate into many more — or more severe — cases of allergy, and add to the burden on health care systems. It would also be bad news for farmers.
Atopica involved researchers from fields as diverse as biology and climatology. It has developed modelling techniques that could support similar prospective studies for other invasive species, and it has generated a wealth of clinical data that could hold new clues about the development of allergies.

Ambrosia forever?
Ragweed, an alien species that originated in North America, has been proliferating in Europe since the 1940s. Invasive and resilient, it now infests many parts of the EU, reducing crop yields and affecting the population’s quality of life.
Atopica conducted clinical trials and laboratory studies to shed new light on the prevalence and mechanisms of ragweed allergy. It also developed scenarios of likely changes in air quality, climate and land use to project the evolution of the ragweed threat to human health by 2050.

With not long to go before the end of Atopica in March 2015, final figures and conclusions are yet to be produced. However, says Epstein, the key message is clear: ragweed is highly likely to spread from its current footholds in Europe across most of the continent.
For further information: http://ec.europa.eu/research/infocentre/article_en.cfm?id=/research/headlines/news/article_15_03_11_en.html?infocentre&item=Infocentre&artid=34156