Listeria monocytogenes is the species of pathogenic bacteria that causes the infection listeriosis. It is a facultative anaerobic bacterium, capable of surviving in the presence or absence of oxygen. It can grow and reproduce inside the host's cells and is one of the most virulent foodborne pathogens. Twenty to thirty percent of foodborne listeriosis infections in high-risk individuals may be fatal. In the European Union, listeriosis continues an upward trend that began in 2008, causing 2,161 confirmed cases and 210 reported deaths in 2014, 16% more than in 2013. In the EU, listeriosis mortality rates also are higher than those of other foodborne pathogens. Responsible for an estimated 1,600 illnesses and 260 deaths in the United States annually, listeriosis ranks third in total number of deaths among foodborne bacterial pathogens, with fatality rates exceeding even Salmonella spp. and Clostridium botulinum.
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.
Multilocus sequence typing (MLST) is a technique in molecular biology for the typing of multiple loci, using DNA sequences of internal fragments of multiple housekeeping genes to characterize isolates of microbial species.
Mycobacteroides immunogenum is a species of bacteria from the phylum Actinomycetota, belonging to the genus Mycobacteroides.
Methanobacterium is a genus of the Methanobacteria class in the Archaea kingdom, which produce methane as a metabolic byproduct. Despite the name, this genus belongs not to the bacterial domain but the archaeal domain. Methanobacterium are nonmotile and live without oxygen, which is toxic to them, and they only inhabit anoxic environments.
The genus Lysobacter belongs to the family Xanthomonadaceae within the Gammaproteobacteria and includes at least 46 named species, including: Lysobacter enzymogenes, L. antibioticus, L. gummosus, L. brunescens, L. defluvii, L. niabensis, L. niastensis, L. daejeonensis, L. yangpyeongensis, L. koreensis, L. concretionis, L. spongiicola, and L. capsici. Lysobacter spp. were originally grouped with myxobacteria because they shared the distinctive trait of gliding motility, but they uniquely display a number of traits that distinguish them from other taxonomically and ecologically related microbes including high genomic G+C content and the lack of flagella. The feature of gliding motility alone has piqued the interest of many, since the role of gliding bacteria in soil ecology is poorly understood. In addition, while a number of different mechanisms have been proposed for gliding motility among a wide range of bacterial species, the genetic mechanism in Lysobacter remains unknown. Members of the Lysobacter group have gained broad interest for production of extracellular enzymes. The group is also regarded as a rich source for production of novel antibiotics, such as β-lactams containing substituted side chains, macrocyclic lactams and macrocyclic peptide or depsipeptide antibiotics like the katanosins.
Venenivibrio stagnispumantis strain CP.B2 is the first microorganisms isolated from the terrestrial hot spring Champagne Pool in Waiotapu, New Zealand.
Lonar Lake, also known as Lonar crater, is a saline, soda lake, located at Lonar, 79 km from Buldhana city in Buldhana district, Maharashtra, India. It is a notified National Geo-heritage Monument,
Marine fungi are species of fungi that live in marine or estuarine environments. They are not a taxonomic group, but share a common habitat. Obligate marine fungi grow exclusively in the marine habitat while wholly or sporadically submerged in sea water. Facultative marine fungi normally occupy terrestrial or freshwater habitats, but are capable of living or even sporulating in a marine habitat. About 444 species of marine fungi have been described, including seven genera and ten species of basidiomycetes, and 177 genera and 360 species of ascomycetes. The remainder of the marine fungi are chytrids and mitosporic or asexual fungi. Many species of marine fungi are known only from spores and it is likely a large number of species have yet to be discovered. In fact, it is thought that less than 1% of all marine fungal species have been described, due to difficulty in targeting marine fungal DNA and difficulties that arise in attempting to grow cultures of marine fungi. It is impracticable to culture many of these fungi, but their nature can be investigated by examining seawater samples and undertaking rDNA analysis of the fungal material found.
Listeria ivanovii is a species of bacteria in the genus Listeria. The listeria are rod-shaped bacteria, do not produce spores, and become positively stained when subjected to Gram staining. Of the six bacteria species within the genus, L. ivanovii is one of the two pathogenic species. In 1955 Bulgaria, the first known isolation of this species was found from sheep. It behaves like L. monocytogenes, but is found almost exclusively in ruminants. The species is named in honor of Bulgarian microbiologist Ivan Ivanov. This species is facultatively anaerobic, which makes it possible for it to go through fermentation when there is oxygen depletion.
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.
Marichromatium is a genus in the phylum Pseudomonadota (Bacteria). The name Marichromatium derives from: Latin mare, the sea; Neo-Latin Chromatium, a genus name; to give Marichromatium, the Chromatium of the sea, the truly marine Chromatium.
Corynebacterium alimapuense is a species of bacteria in the genus Corynebacterium that was described as a novel species in 2019. It is a Gram positive, non-motile, aerobic bacterium that does not form spores. Its type strain was isolated from marine sediment from Valparaíso Bay, Chile. The draft genome sequence of the type strain is deposited in DNA Data Bank of Japan, European Nucleotide Archive and GenBank under the accession number PTJO00000000.
Listeria innocua is a species of Gram-positive, rod-shaped bacteria. It is motile, facultatively anaerobic, and non-spore-forming. L. innocua was named innocua (innocuous) because, in contrast to Listeria monocytogenes, it does not readily cause disease in mammals. Another Listeria species, L. seeligeri, was named after one of the discoverers of L. innocua.
Kyrpidia is a genus of Gram-positive, rod-shaped, thermophilic, spore-forming bacteria.
Kyrpidia tusciae is a species of Gram positive, facultatively anaerobic, thermophilic bacterium. The cells are rod-shaped and form spores.
Staphylococcus borealis is a bacterial species, member of the genus Staphylococcus, closely related to Staphylococcus haemolyticus and described in 2020. Its cells are Gram positive, coccoid in shape, with a diameter of 0.65 to 1.23 μm and form clusters. Additionally, they are facultative anaerobic, coagulase negative and catalase positive. The type strain was isolated from human blood culture at the University Hospital of North Norway, in 1997. Four additional strains included in the description were isolated from skin swabs, from healthy volunteers. The genome sequence of the type strain is deposited in DNA Data Bank of Japan, European Nucleotide Archive and GenBank under the accession number JABVEJ000000000.
Acinetobacter portensis is a species of Gram-negative bacteria of the genus Acinetobacter described in 2020. The description was based on the characterization of four strains, isolated from raw beef, chicken, pork and turkey meat, collected from supermarkets in Porto, Portugal, in 2014. The type strain of the species is available at the Culture Collection University of Gothenburg (CCUG) and the Czech Collection of Microorganisms (CCM), under the deposit numbers CCUG 68672T and CCM 8789T, respectively. The draft genome sequence of the type strain is deposited in DNA Data Bank of Japan, European Nucleotide Archive and GenBank under the accession number LWRV00000000.
Ligilactobacillus animalis is a non-motile, homofermentative species in the Gram-positive genus Ligilactobacillus, initially isolated from the dental plaque of primates and intestinal samples of a dog and mouse. L. animalis has optimal growth at 37°C on MRS agar, making this species mesophilic. The first reported isolates could ferment cellobiose, fructose, glucose, lactose, maltose, melibiose, raffinose, and salicin, but not xylose. The genome size of the type strain is 1.89 Mbp and the G/C content is 41.1%.
