Inter-strain variability on the cardinal parameters (pH and A < sub > w < /sub > ) of clinical and food isolates of Listeria monocytogenes using turbidimetric measurements

This study aims to gain knowledge about the inter-strain variability of twenty-six clinical and food L. monocytogenes isolates with the estimation of their cardinal parameters using turbidimetric measurements. To analyse the data and to obtain the estimated cardinal values, a common statistical procedure was set up. The estimation of cardinal parameters showed a high inter-strain variability of L. monocytogenes, and no correlation was observed between Aw min and pHmin values for the studied strains. By grouping the strains in clinical, meat and fish origin, it was observed that strains from the meat group presented the lowest average pHmin values (4.57), thus showing potential acid adaptation. This work contributes to gain knowledge of the inter-strain variability of L. monocytogenes in relation with pH and Aw cardinal values, as well as provide a starting point for future validation studies in fish and meat food matrices.PMID:38118355 | DOI:10.1016/j.ijfoodmicro.2023.110521
Source: International Journal of Food Microbiology - Category: Food Science Authors: Source Type: research