Listeria grayi

Listeria grayi
Scientific classification
Kingdom: Bacteria
Division: Firmicutes
Class: Bacilli
Order: Bacillales
Family: Listeriaceae
Genus: Listeria
Species: L. grayi
Binomial name
Listeria grayi
Larsen et al. 1966[1]

Listeria grayi is a species of bacteria. It is a Gram-positive, facultatively anaerobic, motile, non-spore-forming bacillus. It is non-hemolytic. The species was first proposed in 1966. It is named after M.L. Gray, an early researcher in L. monocytogenes[2] There are two subspecies of L. grayi: L. gray subs. grayi, and L. grayi subsp. murrayi.[3]

L. murrayi (named after a co-founder of L. monocytogenes) was originally a separate species of Listeria when proposed in 1971.[4] However, there was controversy over whether L. grayi and L. murrayi were the same species, or belonged in genus Listeria altogether. In 1974, researchers suggested that a new genus be created for the two species, called, Murraya,[5] although furthers studies by other researchers in 1987 proposed that the two species remain in Listeria.[6] In 1996, further studies showed that L. murrayi was a subspecies of L. grayi.[2]

References

  1. ↑ Larsen, H. E., & Seeliger, H. P. R. (1966). A mannitol fermenting Listeria: Listeria grayi sp. n. In Proceedings of the Third International Symposium on Listeriosis. Bilthoven.
  2. 1 2 Rocourt, J., Boerlin, P., Grimont, F., Jacquet, C. and Piffaretti, J.C., 1992. Assignment of Listeria grayi and Listeria murrayi to a single species, Listeria grayi, with a revised description of Listeria grayi. International Journal of Systematic and Evolutionary Microbiology, 42(1), pp.171-174.
  3. ↑ Sallen, B., Rajoharison, A., Desvarenne, S., Quinn, F. and Mabilat, C., 1996. Comparative analysis of 16S and 23S rRNA sequences of Listeria species. International Journal of Systematic and Evolutionary Microbiology, 46(3), pp.669-674.
  4. ↑ Welshimer, H.J. and MEREDITH, A.L., 1971. Listeria murrayi. sp. n.: a Nitrate-Reducing Mannitol-Fermenting Listeria. International Journal of Systematic and Evolutionary Microbiology, 21(1), pp.3-7.
  5. ↑ Stuart, S.E. and Welshimer, H.J., 1974. Taxonomic reexamination of Listeria Pirie and transfer of Listeria grayi and Listeria murrayi to a new genus, Murraya. International Journal of Systematic and Evolutionary Microbiology, 24(2), pp.177-185.
  6. ↑ Rocourt, J., Wehmeyer, U., Cossart, P. and Stackebrandt, E., 1987. Proposal to retain Listeria murrayi and Listeria grayi in the genus Listeria. International Journal of Systematic and Evolutionary Microbiology, 37(3), pp.298-300.


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