This review has been directed to describe the present state of experimental
animal studies investigating the effects of automobile associated air poll
ution on allergen sensitization and responsiveness. There is mounting evide
nce from a large body of studies in animals indicating that oxidative, as w
ell as particulate air pollutants, may enhance allergen responses. Ozone an
d diesel exhaust al-e the pollutant components for which the literature on
animal studies is most conclusive. The experiences from experimental animal
studies suggest the plausibility of the influence of ambient air pollution
together with other factors, on airway health and allergy in humans.