Airborne pollen calendar of Salamanca, Spain, 2000-2007

In aerobiological terms Poaceae pollen seems to be a major risk for potential sensitised individuals due to its known allergenicity and its high atmospheric concentrations between late spring and early summer, followed by Cupressaceae, Olea and Platanus pollen grains, and taking into account the possible role of Fraxinus and Quercus in earl spring allergenic courses and in processes of cross-sensitivity, respectively.