The papers presented reflected problems associated with medical screening and biomonitoring for the effects of occupational exposure. There were three primary topics considered at the conference. The first dealt with the legal, social and ethical issues related to medical screening and medical monitoring. The second topic concerned issues in assessment and evaluation of screening programs. The exercise tolerance test as a screening test in coronary heart disease, use of chest radiography for low back pain screening, screening for bladder cancer, diagnostic techniques for use in certain diseases dermatologic screening, damage from exposure to benzo(a)pyrene (50328), computerized screening for neurobehavioral changes in the workplace, detection of early pregnancy and fetal loss, and respiratory function tests in the screening of workers were emphasized. Occupational ecogenetics, interactions between genes and environment in the workplace, epidemiological use of genetic screening in the workplace, chromosome alterations as markers of exposure and effect, and immunoassays to adducts of benzo(a)pyrene and DNA in the biomonitoring of workers exposed to carcinogens, comprised the third major topic of the conference. (Copyright (c) 1986 by the American Occupational Medical Association.)