Exploratory data analysis Listeria monocytogenes in dairy production process: an exploration of available data

Due to the insufficient qualitative data of Listeria monocytogenes in production environment, this study was aimed to evaluate the possibility to extract from a historical database useful information about the occurrence of Listeria monocytogenes in different production process areas. Estimated probabilities (p) and confidence limit (CL) were calculated using 3276 environmental samples data analysed by GLMM model. The attempt to use historical data to estimate the occurrence of Listeria monocytogenes in processing environment leads for some areas to high p value wide CL. The results suggest the need for a targeted environmental sampling plan and provides some estimate sampling size.