Bindii (Jo Jo) dermatitis (Soliva pterosperma [Compositae]).
Bindii dermatitis is a distinctive eruption occurring in some Australian children during spring and early summer and characterized by discrete erythematous papules with puncta, concentrated over the palms, soles, and knees. In three affected individuals (but not in thirteen controls), pricking the skin with bindii seed produced an erythematous, indurated papule that appeared within 48 hours of intradermal pricking and simulated the primary lesion. Pathogenesis may involve an allergic reaction with a retained depot of antigen rather than a nonspecific foreign body injury reaction.
D001315:Australia; D002648:Child; D003877:Dermatitis, Contact / Q000209:etiology* / Q000276:immunology / Q000473:pathology; D003937:Diagnosis, Differential; D005121:Extremities; D005549:Foreign-Body Reaction / Q000175:diagnosis; D006801:Humans; D010328:Patch Tests; D012639:Seeds