Background: Chronic exposure to cement dust has been reported to lead to several health problems. Acute and chronic exposure to quartz are associated with the provocation of an inflammatory response and triggers an extensive host defense mechanism. These inflammatory reactions result in the secretions of cytokines, eicosanoids. lytic enzymes, chemotactic factors and reactive oxygen species (ROS). This Study was designed to investigate the plasma oxidant and antioxidant status in cement plant workers.