The impact of climate change in pollen food allergy syndrome

To evaluate the effect of climate change on pollen allergenicity, lengthening of the pollen season, and the spread of invasive species such as ragweed. To assess evidence to determine whether these effects are impacting the prevalence of pollen food syndrome (PFS).

There is good evidence to demonstrate that markers of climate change, including rising temperatures and to some extent greenhouse gases, are responsible for a rise in the allergenicity of pollen and an increase in the duration of the pollen season, especially for trees. These changes are likely to be linked to the increase in the prevalence of seasonal allergic rhinitis (SAR), especially in children. Sensitization to pollen, especially tree pollen, is also a risk factor for the development of PFS. Thought to mainly affect adults, recent evidence suggests that there is a rise in the prevalence of PFS in children, linked to an increase in SAR.

Increasing SAR due to climate change could lead to a greater number of children and adults developing PFS. Although PFS is generally considered to be a mild condition, severe reactions can occur and there might be numerous plant food triggers, which can adversely affect dietary choice and nutritional intake.