Abstract
The very breadth of interest of the field of occupational medicine requires a broad interest in many disciplines by those practicing this specialty. Post hoc reasoning, fuzzy thinking with respect to cause and effect relationships and a lack of understanding of the actual effects of specific agents on man, make for continuous difficulty in proper diagnosis and treatment. Diagnosis of occupational disease may be facilitated by means of the epidemiological method and by traditional clinical methods. New diagnostic procedures must be utilized more widely if proper diagnoses are to be made.