[Allergy and the environment].

The prevalence of allergic diseases has increased in modern Western countries during the last decades. Among the hypotheses for the reasons the idea that environmental pollutants may play a role is intensively discussed. In order to characterise the influence of these pollutants on the development, elicitation and chronification of allergic reactions (allergotoxicology) epidemiological, clinical and experimental data have to be considered. These investigations showed that among the pollutants with an enhancing effect on allergic diseases pollution types with nitrogen oxides (NOx), ozone (O3), tobacco smoke, particulate matter and diesel exhaust particles are of special interest.