TY - JOUR T1 - Eosinophilia and diseases: Clinical revision of 1862 cases AU - Lombardi C, Passalacqua G Y1 - 2003/06/09 N1 - 10.1001/archinte.163.11.1371-a JO - Archives of Internal Medicine SP - 1371 EP - 1373 VL - 163 IS - 11 N2 - Eosinophils were first described in 1879 by Paul Ehrlich, based on their staining behavior. Eosinophils are a subpopulation of leukocytes, originating in the bone marrow from a CD34+ precursor. They circulate in peripheral blood, where they represent 2% to 3% of total white cells, and have a half-life of approximately 8 to 18 hours. Nevertheless, once recruited in peripheral tissues by specific cytokines, eosinophils can survive for days or weeks as resident cells. Eosinophils possess a powerful enzymatic machinery (eosinophil-derived neurotoxin, eosinophil cationic protein, and major basic protein) not shared with other types of granulocytes.1 SN - 0003-9926 M3 - doi: 10.1001/archinte.163.11.1371-a UR - http://dx.doi.org/10.1001/archinte.163.11.1371-a ER -