Dermatitis in a rubber tyre factory.
An outbreak of occupational dermatitis in a rubber tyre factory is reported. An unusual clinical picture was recognized. Patch tests revealed a high sensitization rate to the MBT derivative used: 2-(2'-4'dinitrophenylthio)benzothiazole. Since tests with MBT mix and dinitrophenol were negative; sensitization to a contaminant was suspected. DNCB was traced as the substance responsible.