In a previous study1 the value of the Schilling blood count was determined in various infections of childhood. It was found that certain definite changes occurred in the blood smear with regularity, and that the course of an illness could often be anticipated by a daily differential count. An increase in the healthy and degenerated immature, polymorphonuclear neutrophil cells was noted at the height of infection. There were also lymphopenia and aneosinophilia. A decrease in the young forms with a return of the lymphocytes and the eosinophils indicated improvement somewhat in advance of the clinical signs.
The present work is devoted to repeated examinations by the Schilling method of the leukocytic changes in the blood of infants and children acutely ill with pneumonia.
Kohlman2 made Schilling blood smears in fifty cases of lobar, bronchial and influenzal pneumonia in adults. He concluded that this count gives prognostic aid,