[Monitoring of persons exposed to perchloroethylene or styrene]

Forty-nine employees exposed to perchloroethylene (dry cleaning) and 41 employees exposed to styrene (fiber reinforced polyester) are compared to a control group of 68 persons. Symptoms such as dizziness, mouth dryness, fatigue, mucous membranes and skin irritation appear more frequently among the exposed groups, while liver and kidney functions remain unchanged. This study demonstrates that medical examination, industrial hygiene survey and biological monitoring can complement each other in the evaluation of work conditions.