Polyneuritis incidence in shoe factory workers: cases report and etiological considerations.

This study describes an outbreak of polyneuropathies in an artificial leather shoe factory. Thirty-seven females employed in the factory were examined; clinical findings and hematochemical data suggest a possible role of tricresylphosphate (TCP) in the genesis of these polyneuropathies. A high percentage of subjects evidenced definite signs of upper-motor neuron involvement, which appeared at an early or late stage of the disease. A statistically significant (P less than .001) reduction of red-blood-cell acetylcholinesterase (AChE) was found in the subjects. The ascertained upper-motor neuron involvement suggests a connection with previously described intoxications by TCP- by ingestion or occupational poisoning. The reduction of AChE seems attributable to TCP, and not to n-hexane, whose anti-AChE activity has never been demonstrated.