Eosinophilia and Some Peculiarly Staining Leucocytes

Introduction.?? Eosinophilia ' is very much in fashion just now in medical literature. Terms such as ' eosinophilia of lungs ' tropical eosinophilia ' and ' idiopathic eosinophilia' do certainly connote certain syndromes the existence of which cannot be denied. However, experience with certain peculiarly staining leucocytes met with under varying conditions of health may prove interesting in this connection, and this paper describes some practical difficulties ancf fallacies in the diagnosis of ' eosinophilia.' The problem.?Differentiation of neutrophil polymorphonuclear leucocytes (polymorphs) from eosinophil polymorphonuclear leucocytes (eosinophils) is a comparatively easy matter, and yet cases have been seen both in India and in the Middle East where difficulties arose, the reason for the difficulty being a peculiar staining of some of the cells of the granulocyte series. In all, 12 cases were studied, but only four