ABSTRACT
Forty-six workers exposed to different types of organic solvents and fourteen workers far from exposure were included in this study. The exposed workers were classified into 3 groups according to the nature of the work and the type of solvent; group A [acetone, n-hexane-exposed workers], group B [toluene, xylene-exposed workers] and group C [trichloroethylene, isopropyl alcohol, methyl alcohol exposed workers]. Routine liver function tests appear normal. Serum bile acid and serum cholinesteracse were estimated in all workers. The results showed a significant increase in serum bile acid in all exposed groups compared with the non-exposed group. Serum cholinesterase activity was significantly lower in the exposed groups than the non-exposed group. From these results we can conclude that, serum bile acid and serum cholinesterase represent an early and sensitive tests for detection of organic solvent hepatotoxicity