Neutropenia

特許 権利維持 Neutropenia or neutropaenia, from Latin prefix neutro- ("neither", for neutral staining) and Greek suffix -πενία (-penía, "deficiency"), is a granulocyte disorder characterized by an abnormally low number of neutrophils. Neutrophils usually make up 60 to 70% of circulating white blood cells and serve as the primary defense against infections by destroying bacteria in the blood.