Activity of selected enzymes of peripheral blood erythrocytes and serum haptoglobin levels in workers occupationally exposed to styrene and formaldehyde

: In 48 and 30 workers exposed to styrene and formaldehyde respectively activities of erythrocyte acetylcholinesterase lactate dehydrogenase and glucose-6-phosphate dehydrogenase, were determined. Hematocrit, haemoglobin concentration, red blood cell count and serum haptoglobin levels were also determined. Significant decrease in erythrocyte acetylcholinesterase activity in workers exposed to styrene for 61-180 months was stated. Moreover, increased erythrocyte lactate dehydrogenase activity and decreased serum haptoglobin level was found in workers exposed to formaldehyde for 3-24 months. There were no differences in basic hematological parameters and erythrocyte glucose-6-phosphate dehydrogenase activity in both groups studied as compared to the control group.