A series of differential blood-counts made on apparently normal infants and children serves as the basis of this communication. The investigation was undertaken primarily to determine, if possible, the normal percentages of the cells with eosinophilic granules. In the normal adult these cells are supposed to constitute from 1 to 4 per cent. of the total leukocytes. It is generally stated that in infants and children the normal percentages of the eosinophil leukocytes may be much greater than in adults. Emerson1 speaks of a physiological eosinophilia of childhood. Wood2 gives the variations of the eosinophil cells in the nursing period from 7.5 to 0.5 per cent. and in childhood as from 0.7 to 12.5 per cent. Ewing3 considers the average of the eosinophil cells in childhood 1 to 2 per cent. greater than in adults. The same figures are given by Wile.4 In institutional
SCHLOSS OM. THE NORMAL PERCENTAGES OF THE DIFFERENT VARIETIES OF LEUKOCYTES IN INFANTS AND CHILDREN. Arch Intern Med (Chic). 1910;VI(6):638–645. doi:10.1001/archinte.1910.00050340024003
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