Studies from medical biology studies

AGLAE processes data from series of proficiency tests and draws in particular information about the analytical methods or interlaboratory dispersions. These studies aim to inform laboratories. Besides, they can help understand the differences or observations laboratories may also observe.

The following studies have been conducted in medical biology:

• Data dispersion in urine cytology
• Time-to-positivity in blood culture

We invite you to send us your comments on these documents.

Data dispersion in urine cytology

AGLAE has been providing External Quality Assessments of urine cytology analysis for over 10 years.
All the results collected have enabled us to model the dispersions expected at different concentration levels of white blood cells and red cells according to the three main methods: manual analysis, by Sysmex UF Analysers and by BECKMAN / IRIS IQ INSTRUMENTS.
We compared these dispersions observed in inter-laboratory tests.

Download a poster presented at the 2023 International Metrology Congress summarising this study.
To go further, find also attached the complete study (in French): barèmes de fidélité en cytologie urinaire

Time-to-positivity in blood culture

Does the incubation period for detecting blood culture bottles as positive depend on the automated systems? Or on the bacterial species present in the blood?

The observations presented in this study are based on the results of 12 External Quality Assessments carried out between 2017 and 2020.

Download the Study of time-to-positivity in blood culture (in French)