lymphocytic leukemoid reaction

lym·pho·cyt·ic leu·ke·moid re·ac·tion

leukocytosis of varying degree, with adult lymphocytes and immature forms amounting to 40% (or more) of the total number of white blood cells in the circulating blood; may be observed in association with pertussis, infectious mononucleosis, gonorrhea, chickenpox, and sarcoidosis.