Enhancing cell resistance for production of mixed microbiological reference materials with Salmonella and coliforms by freeze-drying.

ABSTRACT: The reference material (RM) is a technical requirement for the quality assurance of analytical results and proficiency tests or interlaboratory comparisons. Microbiological RMs are most available in the dehydrated form, mainly by freeze-drying, and maintaining bacterial survival after preparation is a challenge. Thus, obtaining the most resistant cells is essential. Considering that bacteria present cross-response to dehydration after being submitted to an array of stress conditions, this study aimed to evaluate the influence of growth conditions on enterobacteria for the production of mixed microbiological RMs by freeze-drying in skim milk powder. Salmonella enterica serovar Enteritidis, Cronobacter sakazakii, Escherichia coli, and Citrobacter freundii were grown in a minimal medium with

SUBMITTER: da Silva MR 

PROVIDER: S-EPMC9679061 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature