A survey of 11 corn processing plants in two states indicated an occupational dermatitis rate of from 3% to 7% in the employees on the processing lines. The lesions observed were of the contact dermatitis variety, which is no different from the dermatitis seen in other food processing industries.
Twenty-five unexposed controls, 15 corn-processing workers with a dermatitis and four corn-processing employees without dermatitis were patch tested to the components of corn. All test sites were negative at both the 48-hour and 72-hour readings.
It was concluded from the study that corn dermatitis was not due to an allergic hypersensitivity, but possibly was caused by a low-grade irritant.
Seligman EJ, Key MM. Corn Dermatitis. Arch Dermatol. 1968;97(6):664-666. doi:10.1001/archderm.1968.01610120054007