Leukocyte Response in Childhood Infectious Mononucleosis

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Abstract
• The usual leukocyte response in infectious mononucleosis (IM) has been established in adults but not in children. Previously, the diagnosis of IM often was difficult in childhood due to the lack of detectable heterophil antibody response in many patients. Using Epstein-Barr virus-specific serology, we have documented IM in 45 patients between 1 and 15 years of age. The mean and ranges for the total leukocytes, percent lymphocytes, and percent atypical lymphocytes are presented. These do not vary significantly with age and are similar to those reported for adolescents and adults with this illness. (Am J Dis Child 1981;135:699-702)