title: White blood cell count and differential count.
abstract: Current methods for performing the white blood cell count and differential count along with recent technologic advances are discussed. Sources of error and variation in these tests are presented. The use of the white blood cell count and the differential count in a variety clinical situations is reviewed.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D004630:Emergencies; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007958:Leukocyte Count / Q000379:methods; D007962:Leukocytes / Q000145:classification / Q000502:physiology; D007964:Leukocytosis / Q000175:diagnosis; D007970:Leukopenia / Q000175:diagnosis; D008875:Middle Aged; D012016:Reference Values; D012727:Sex Characteristics