ABSTRACT This cross‐sectional biomonitoring study examines hematological alterations associated with occupational exposure to heavy metals among gasoline station workers in Erbil, Iraq. Seventy‐five exposed workers and 25 unexposed controls were assessed. Complete blood counts and concentrations of heavy metals (Cr, Mn, Fe Co, Ni, Cu, Zn, As, Se, Hg, Pb, and V) in scalp hair and dust were analyzed using x‐ray fluorescence spectrometry. Significant hematological changes were observed in exposed workers compared to controls, including elevated red blood cell (RBC) counts, hemoglobin (Hb) levels, hematocrit (Hct), white blood cell (WBC) counts, neutrophils, platelet numbers, and red cell distribution width (RDW), alongside decreased lymphocyte percentages. These alterations were more pronounced among workers with ≥15 years of service and those aged ≥51 years, reflecting the cumulative impact of long‐term exposure and physiological aging. Correlation analyses revealed associations between metals and hematological disruptions, especially in parameters related to erythropoiesis and inflammation. The study highlights a clear exposure–response relationship and underscores the urgent need for regular biomonitoring, improved occupational health measures, and strict control of environmental contaminants in petroleum‐related workplaces.
Yasin et al. (Sun,) studied this question.