The influence of locally administered ultraviolet light (UVB) on the allergic contact dermatitis in the mouse.

A quantitative model of contact allergy to picryl chloride in the mouse was used to evaluate the influence of locally administered ultraviolet light (UVB) on sensitization and challenge. UVB was given in three different doses immediately before and 24 h before sensitization and challenge, respectively. A suppressive effect was demonstrated on the afferent as well as on the efferent limb of the allergic reaction.