[Effect of occupational exposure in coke production on various parameters of the hematopoietic system].

The basic parameters of the erythrocytes, white blood cell and coagulation were determined in 201 workers exposed occupationally to organic substances containing benzene and its homologues. Occupational exposure to many factors during coke production, especially to high concentrations of BaP, did not cause perceptible changes in the erythrocytes. Moreover, total number of the lymphocytes was increased in the peripheral blood of exposed workers. That maybe considered as a nonspecific exposure test for the influence of the aromatic hydrocarbons. In haemostasis system the thrombocytopenia and the abnormalities of the plasma coagulation factors were revealed.