Listeria is a genus of bacteria that acts as an intracellular parasite in mammals. By 2024, 28 species had been identified. The genus is named in honour of the British pioneer of sterile surgery Joseph Lister. Listeria species are Gram-positive, rod-shaped, and facultatively anaerobic, and do not produce endospores.
Bacillus mycoides is a bacterium of the genus Bacillus. Like other Bacillus species, B. mycoides is Gram positive, rod-shaped, and forms spores. B. mycoides is distinguished from other Bacillus species by its unusual growth on agar plates, where it forms expansive hairy colonies with characteristic swirls.
Chitinimonas is a genus of Gram-negative, chitinolytic, rod-shaped bacteria which have flagella from the family of Burkholderiaceae which belongs to the class Betaproteobacteria. All species of Chitinimonas have been found in regions of Asia. Species of this genus are found to be both aerobic and anaerobic. Chitinimonas is optimally grown and cultured at 25 °C to 37 °C, with very little concentrations of NaCl.
Listeria marthii is a species of bacteria. It is a Gram-positive, motile, facultatively anaerobic, non-spore-forming bacillus. It is non-pathogenic, and non-hemolytic. The species was first isolated from Finger Lakes National Forest in New York. It is named after Elmer H. Marth, a researcher of L. monocytogenes, and was first published in 2010. L. marthii was the first new species of Listeria proposed since 1985.
Listeria rocourtiae is a species of bacteria. It is a Gram-positive, facultatively anaerobic, motile, non-spore-forming bacillus. It is non-pathongenic and non-hemolytic. The species was first isolated from pre-cut lettuce in Salzburg, Austria in 2002. It is named in honor of Jocelyne Rocourt, "whose work had a major impact on the taxonomy of the genus Listeria."
Listeria aquatica is a Gram-positive, facultatively anaerobic, nonmotile, non-spore-forming rod-shaped species of bacteria. It is not pathogenic. It was discovered from running water in Florida, and was first described in 2014. Its name comes from Latin, "found in water, aquatic".
Listeria riparia is a species of bacteria. It is a Gram-positive, facultatively anaerobic, non-motile, non-spore-forming bacillus. It is non-pathongenic. Its name refers to the riparian zone, and its discovery was first published in 2014.
Listeria cornellensis is a species of bacteria. It is a Gram-positive, facultatively anaerobic, non-motile, non-spore-forming bacillus. It is non-pathogenic. The species was named after Cornell University, and its discovery was first published in 2014.
Listeria floridensis is a species of bacteria. It is a Gram-positive, facultatively anaerobic, non-motile, non-spore-forming bacillus. It is non-pathongenic and non-hemolytic. The species was discovered in and named after Florida, and its discovery was first published in 2014.
Listeria grandensis is a species of bacteria. It is a Gram-positive, facultatively anaerobic, non-motile, non-spore-forming bacillus. It is non-pathongenic and non-hemolytic. The species was discovered in and named after Grand County, Colorado, and its discovery was first published in 2014.
Listeria booriae is a Gram-positive, facultatively anaerobic, nonmotile, non-spore-forming rod-shaped species of bacteria. It is not pathogenic and nonhemolytic. It was discovered in a dairy processing plant in the Northeastern United States, and was first described in 2015. The species name honors "Kathryn Boor, a United States food scientist, for her contribution to the understanding of the biology of Listeria."
Listeria newyorkensis is a species of bacteria. It is a Gram-positive, facultatively anaerobic, non-motile, non-spore-forming bacillus. It is non-pathogenic and non-hemolytic. It was discovered in a seafood processing plant in New York, and was first published in 2015.
Listeria fleischmannii is a species of bacteria. It is a Gram-positive, facultatively anaerobic, non-motile, non-spore-forming bacillus. It is non-pathogenic and non-hemolytic. The species was first isolated in 2006 in Switzerland from hard cheese. The species is named after Wilhelm Fleischmann, a pioneer in the research of dairy products.
Listeria seeligeri is a Gram-positive, facultatively anaerobic, motile, nonspore-forming, bacillus-shaped species of bacteria. It is not pathogenic. The species was first isolated from plants, soil, and animal feces in Europe, was first proposed in 1983, and is named after Heinz P. R. Seeliger. Seeliger first proposed the species L. ivanovii and L. innocua, and published extensively on members of the genus Listeria.
Chryseobacterium hispalense is a Gram-negative and non-motile bacteria from the genus Chryseobacterium which has been isolated from a rainwater pond in Spain. Chryseobacterium hispalense can promote plant growth.
Azospirillum is a Gram-negative, microaerophilic, non-fermentative and nitrogen-fixing bacterial genus from the family of Rhodospirillaceae. Azospirillum bacteria can promote plant growth.
Roseomonas is a genus of Gram negative bacteria. The cells are coccoid rods when viewed microscopically. Certain species are known to be opportunistic infections for humans.
Listeria costaricensis is a species of bacterium of the genus Listeria. It is a Gram-stain-positive, rod-shaped bacterium, non-spore-forming and facultatively anaerobic. Colonies are opaque, yellow-pigmented, with a flat shape and entire margin on BHI. Growth occurs at 22–42 °C, with optimal growth at 30–37 °C. It has motility at 37 °C. The bacteria is negative for catalase, haemolysis and nitrite reduction. It can be differentiated from other species of the genus Listeria by the absence of catalase reaction, production of acid from potassium 5-ketogluconate and production of a yellow pigment on BHI. It is presumably non-pathongenic due to the lack of haemolysis and pathogenicity genes on its genome.
Listeria thailandensis is a species of bacteria. It is a Gram-positive, facultatively anaerobic, non-motile, non-spore-forming bacillus. It is non-pathogenic and non-hemolytic. It was isolated from a fried chicken sample from Thailand. The species was first proposed in 2019, and the species name refers to the country from which it was first isolated.
'Listeria goaensis' is a new species identified under the genus Listeria. The type strain of the species was isolated from the sediment of estuarine mangrove swamp of the Mandovi river, Goa, India. The species shows weak hemolysis on 5% sheep and horse-blood agar plates.
