show Abstracthide AbstractPublic databases are frequently biased for time of sampling and/or geographical origin of the bacterial strains. This can lead to an uncorrected estimation of the genomic diversity of a bacterial species. The sequenced genomes of Campylobacter jejuni, Yersinia enterocolitica, Salmonella enterica and Escherichia coli strains within this project aim to increase the genetic base line diversity of the already public available genomic data. All together, the resulting genomic databases will be used in the definition of epidemiological thresholds for surveillance and outbreak investigations.