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Peripheral neuropathy in styrene-exposed workers

F Gobba1, F Cavalleri, D Bontadi

  • 1Department of Biomedical Sciences, University of Modena, Italy.

Scandinavian Journal of Work, Environment & Health
|December 1, 1995
PubMed
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Long-term styrene exposure, even at levels near current occupational limits, may cause peripheral neuropathy and color vision deficits. This suggests current safety limits for styrene may need reevaluation for worker protection.

Area of Science:

  • Occupational Health
  • Neurotoxicology
  • Environmental Medicine

Background:

  • The neurotoxicity of styrene exposure remains a subject of ongoing scientific debate.
  • Investigating the effects of styrene on the peripheral nervous system is crucial for worker safety.

Observation:

  • Two cases of peripheral sensorimotor neuropathy in workers exposed to styrene are presented.
  • Biological monitoring indicated styrene exposure levels between 100% and 150% of American Conference of Governmental Industrial Hygienists (ACGIH) limits.
  • Workers reported symptoms including leg weakness, numbness, cramps, and paresthesia.

Findings:

  • Electrophysiological studies confirmed a moderate, demyelinating-type peripheral sensorimotor neuropathy.
  • Subclinical deficits in color vision were detected through specialized testing.

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  • Other potential causes for neuropathy and dyschromatopsia were systematically excluded.

    • Implications:

    • Long-term occupational exposure to styrene at or slightly above ACGIH limits can lead to clinical peripheral neuropathy and subclinical visual impairment.
    • There is a need to reassess the adequacy of current ACGIH occupational exposure limits for styrene, particularly concerning individual worker protection.
    • These findings highlight the importance of robust biological monitoring and regular health surveillance for workers exposed to styrene.