[Fluorescence microscopic demonstration of eosinophile leucocytes with different fluorochromes (author's transl)]

A screening program involving blood from men and horse resulted in about 80 fluorochromes admitting microscopic differentiation of eosinophile leucocytes (properly their granules) in blood smears. Fluorescence distinguishes either selective, i. e. only eosinophile cells show fluorescence, or specific, that means, eosinophilic granules exhibit fluorescence differing from non-eosinophilic cells by colour and/or intensity.