The deadliest foodborne pathogen in terms of fatality rates is often considered to be *Listeria monocytogenes*. While infections from Listeria are less common compared to other pathogens like Salmonella or E. coli, the consequences can be much more severe, especially for certain high-risk populations. Read more at the link above.
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Listeria valentina sp. nov., isolated from a water trough and the faeces of healthy sheep
In the context of a study on the occurrence of Listeria species in an animal farm environment in Valencia, Spain, six Listeria -like isolates could not be assigned to any known species.
Phylogenetic analysis based on the 16S rRNA gene and on 231 Listeria core genes grouped these isolates in a monophyletic clade within the genus Listeria , with highest similarity to Listeria thailandensis .
Whole-genome sequence analyses based on in silico DNA–DNA hybridization, the average nucleotide blast and the pairwise amino acid identities against all currently known Listeria species confirmed that these isolates constituted a new taxon within the genus Listeria .
Phenotypically, these isolates differed from other Listeria species mainly by the production of acid from inositol, the absence of acidification in presence of methyl α-d-glucoside, and the absence of α-mannosidase and nitrate reductase activities. The name Listeria valentina sp. nov. is proposed for this novel species, and the type strain is CLIP 2019/00642T (=CIP 111799T=DSM 110544T).
FoodWorld 