Within EuroFlow, we recently developed screening tubes for hematological malignancies and immune deficiencies. Pipetting of antibodies for such 8-color 12-marker tubes however is time-consuming and prone to operational mistakes. We therefore evaluated dried formats of the lymphocytosis screening tube (LST) and of the primary immune deficiency orientation tube (PIDOT). Both tubes were evaluated on normal and/or on patient samples, comparing the mean fluorescence intensity of specific lymphocyte populations. Our data show that the dried tubes and liquid counterparts give highly comparable staining results, particularly when analyzed in multidimensional plots. In addition, the use of dried tubes may result in a reduced staining variability between different samples and thereby contributes to the generation of more robust data. Therefore, by using ready-to-use reagents in a dried single test tube format, the laboratory efficiency and quality will be improved.

BD Biosciences San Jose USA

Cancer Research Centre Salamanca Spain

Cytognos SL Salamanca Spain

Department of Immunohematology and Blood Transfusion Leiden The Netherlands

Department of Laboratory Medicine University Hospital Ghent Ghent Belgium

Department of Pediatric Hematology and Oncology 2nd Faculty of Medicine Charles University Prague Czech Republic

Laboratory for Medical Immunology Department of Immunology Erasmus MC University Medical Center Rotterdam Rotterdam The Netherlands

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