User:Yadsalohcin/Listeria thailandensis

The name Listeria thailandensis sp. nov. was proposed for a new species of Listeria after its discovery during screening of food samples in Thailand. The Listeria -like bacterium was recovered from fried chicken and could not be assigned to any previously known species. Analysis suggested that the new discovery has highest similarity to L. floridensis (98.9 %) and L. costaricensis (98.8 %). At the phenotypical level, it differs from other Listeria species by the production of acid from d-tagatose and inositol.

L. Goaensis
Two Listeria -like isolates obtained from mangrove swamps in Goa, India were characterized using polyphasic combinations of phenotypic, chemotaxonomic and whole-genome sequence (WGS)-based approaches. The isolates presented as short, non-spore-forming, Gram-positive rods, that were non-motile, oxidase-negative, catalase-positive and exhibited alpha-haemolysis on 5 ?percent sheep- and horse-blood agar plates. The 16S rRNA gene sequences exhibited 93.7–99.7 ?percent?nucleotide identity to other Listeria species and had less than 92?percent nucleotide identity to species of closely related genera, indicating that the isolates are de facto members of the genus Listeria. Their overall fatty acid composition resembled that of other Listeria species, with quantitative differences in iso C sub(15:0), anteiso C sub(15:0), iso C sub(16:0), C sub(16:0), iso C sub(17:0) and anteiso C sub(17:0) fatty acid profiles. Phylogeny based on 406 core coding DNA sequences grouped these two isolates in a monophyletic clade within the genus Listeria. WGS-based average nucleotide identity and in silico DNA–DNA hybridization values were lower than the recommended cut-off values of 95 and 70?percent, respectively, to the other Listeria species, indicating that they are founding members of a novel Listeria species. We suggest the name Listeria goaensis sp. nov. be created and the type strain is ILCC801 sup(T) (=KCTC 33909;=DSM 29886;=MCC 3285).

In 2018, two samples from mangrove swamps in Goa, India were tested and found to contain Listeria -like cultures. 16S rRNA gene sequences showed 93.7–99.7?% nucleotide identity to other Listeria species. Other resemblances to Listeria species included (despite specific differences) the overall fatty acid composition. However, various differences from other Listeria species (as indicated by WGS-based average nucleotide identity and in silico DNA–DNA hybridization values) suggest that they should be considered to be specimems from a new, diverging Listeria species. It was suggested that the name Listeria goaensis sp. nov. be created for a type strain ILCC801T.

Listeria innocua
Despite its name, and although it is not generally considered a pathogen in terms of human health,  Listeria Innocua is not an entirely innocuous organism, having been identified in 2003 as the cause of a death of a 62-year-old, otherwise healthy, woman.

Listeria bacteria, including L. Innocua, are rod shaped with flagella.

As with other species in teh genus, L. Innocua occurs commonly in the environment (such as soil) and in food.

It is sometimes tested for in the laboratory as an indicator of the survivability of other similar species (and in particular other species of Listeria).

Listeria innocua was first identified during the twentieth century, and knowledge of its specific structure has been refined during the 2000's.