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Mycoplasma
''Mycoplasma'' is a genus of bacteria that, like the other members of the class ''Mollicutes'', lack a cell wall, and its peptidoglycan, around their cell membrane. The absence of peptidoglycan makes them naturally resistant to antibiotics such as the beta-lactam antibiotics that target cell wall synthesis. They can be parasitic or saprotrophic. In casual speech, the name ''"mycoplasma"'' (plural ''mycoplasmas'' or ''mycoplasms'') generally refers to all members of the class Mollicutes. In formal scientific classification, the designation ''Mycoplasma'' refers exclusively to the genus, a member of the Mycoplasmataceae, the only family in the order Mycoplasmatales (see "scientific classification"). In 2018, ''Mycoplasma'' was split with many clinically significant species moved to other genera in Mollicutes; see the page Mollicutes for an overview. Etymology The term "mycoplasma", from the Greek μύκης, ' (fungus) and πλάσμα, ' (formed), was first used by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mollicutes
Mollicutes is a class of bacteria distinguished by the absence of a cell wall and its peptidoglycan. The word "Mollicutes" is derived from the Latin ' (meaning "soft" or "pliable"), and ' (meaning "skin"). Individuals are very small, typically only 0.2–0.3 micrometre, μm (200–300 nanometer, nm) in size and have a very small genome size. They vary in form, although most have sterols that make the cell membrane somewhat more rigid. Many are able to move about through bacterial gliding, gliding, but members of the genus ''Spiroplasma'' are helical and move by twisting. The best-known genus in the Mollicutes is ''Mycoplasma'', though it has been split in 2018 into several genera. Colonies show the typical "fried-egg" appearance. Mollicutes can be parasitic or saprotrophic. They can be parasites of various animals and plants, living on or in the host's cells. Many cause diseases in humans, attaching to cells in the respiratory or urogenital tracts, particularly species of ''Mycopl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycoplasma Mycoides
''Mycoplasma mycoides'' is a bacterial species of the genus ''Mycoplasma'' in the class Mollicutes. This microorganism is a parasite that lives in ruminants. ''Mycoplasma mycoides'' comprises two subspecies, ''Mycoplasma mycoides subsp. mycoides, mycoides'' and ''Mycoplasma mycoides subsp. capri, capri'', which infect cattle and small ruminants such as goats respectively. ''Mycoplasma mycoides'' subsp. ''mycoides'' The subspecies "''Mycoplasma mycoides'' subsp. ''mycoides'' (Mmm)", previously named "''Mycoplasma mycoides'' subsp. ''mycoides'' Small Colony (SC) type (MmmSC)", is known as the agent of contagious bovine pleuropneumonia (CBPP), a contagious lung disease of cattle. It was first isolated in 1898 by Edmond Nocard et al. and the first mycoplasma to be isolated at all. Formerly, ''M. mycoides'' subsp. ''mycoides'' was known as ''Asterococcus mycoides''. The ''Mycoplasma mycoides'' cluster ''Mycoplasma mycoides'' belongs to the ''Mycoplasma mycoides'' cluster, or Mycopla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycoplasmataceae
Mycoplasmataceae is a family of bacteria in the order Mycoplasmatales. This family consists of ''Mycoplasma'' and four more genera. In 1967, the order Mycoplasmatales was incorporated into the class Mollicutes. Sexually-transmitted species and ''Ureaplasma'' are classified in Mycoplasmoidaceae since 2018. Taxonomy ''Mycoplasma'' ''Mycoplasma'' is a genus of bacteria that lack a cell wall and possess a three-layered cellular membrane. They can be parasitic or saprotrophic. Several species formerly classified as ''Mycoplasma'' are sexually transmitted and pathogenic in humans (see ). Others are found on cats, dogs, and barnyard fowl. Taxa infecting insects A few genera infecting insects were added to this family in 2019 using molecular phylogenetic evidence. These genera were originally called Entomoplasmataceae and believed to be monophyletic.Revised taxonomy of the class Mollicutes: proposed elevation of a monophyletic cluster of arthropod-associated mollicutes to ord ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycoplasma Haemofelis
''Mycoplasma haemofelis'' is an epierythrocytic parasitic bacterium. It often appears in bloodsmears as small (0.6 μm) coccoid bodies, sometimes forming short chains of three to eight organisms. It is usually the causative agent of feline infectious anemia (FIA) in Canada and the United States. The ~1.15 Mb genome contains a minimalistic assortment of genes limited to the most basic cellular functions. This leaves ''M. haemofelis'' inextricably dependent upon its host for the provision of amino acids, cholesterol, vitamins and fatty acids. The complex and specific conditions that the bacterium requires have made it impossible to culture outside a host thus far. Arthropod vectors are thought to be the primary source of infection, although ''M. haemofelis'' is also known to be transmitted from queen to kitten and following blood transfusion. Immunocompromisation and/or coinfection with FeLV, FIV and other ''Mycoplasma'' species can exacerbate symptoms or cause symp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mycoplasmatales
Mycoplasmatales is an order of bacteria in the class Mollicutes. The order consists of the families Spiroplasmataceae and Mycoplasmataceae. As currently (2025) defined by LPSN, this class is synonymous to Entomoplasmatales, a class originally intended to include the arthropod-associated mollicutes. Newer phylogenetic studies have found that Entomoplasmatales was not monophyletic like Tully had believed, but paraphyletic. The family Entomoplasmataceae of Tully was also paraphyletic by the exclusion of ''Mycoplasma''. Phylogeny The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information The National Center for Biotechnology Information (NCBI) is part of the National Library of Medicine (NLM), a branch of the National Institutes of Health (NIH). It is approved and funded by the government of the United States. The NCBI is lo ... (NCBI). References Mollicutes Bacte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bacteria
Bacteria (; : bacterium) are ubiquitous, mostly free-living organisms often consisting of one Cell (biology), biological cell. They constitute a large domain (biology), domain of Prokaryote, prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit the air, soil, water, Hot spring, acidic hot springs, radioactive waste, and the deep biosphere of Earth's crust. Bacteria play a vital role in many stages of the nutrient cycle by recycling nutrients and the nitrogen fixation, fixation of nitrogen from the Earth's atmosphere, atmosphere. The nutrient cycle includes the decomposition of cadaver, dead bodies; bacteria are responsible for the putrefaction stage in this process. In the biological communities surrounding hydrothermal vents and cold seeps, extremophile bacteria provide the nutrients needed to sustain life by converting dissolved compounds, suc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytoplasma
Phytoplasmas are obligate intracellular parasites of plant phloem tissue and of the insect vectors that are involved in their plant-to-plant transmission. Phytoplasmas were discovered in 1967 by Japanese scientists who termed them mycoplasma-like organisms. Since their discovery, phytoplasmas have resisted all attempts at ''in vitro'' culture in any cell-free medium; routine cultivation in an artificial medium thus remains a major challenge. Phytoplasmas are characterized by the lack of a cell wall, a pleiomorphic or filamentous shape, a diameter normally less than 1 μm, and a very small genome. Phytoplasmas are pathogens of agriculturally important plants, including coconut, sugarcane, sandalwood, and cannabis, as well as horticultural crops like sweet cherry, peaches, and nectarines. They cause a wide variety of symptoms ranging from mild yellowing, small fruit, and reduced sugar content to death. Phytoplasmas are most prevalent in tropical and subtropical regions. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prokaryotes
A prokaryote (; less commonly spelled procaryote) is a single-celled organism whose cell lacks a nucleus and other membrane-bound organelles. The word ''prokaryote'' comes from the Ancient Greek (), meaning 'before', and (), meaning 'nut' or 'kernel'. In the earlier two-empire system arising from the work of Édouard Chatton, prokaryotes were classified within the empire Prokaryota. However, in the three-domain system, based upon molecular phylogenetics, prokaryotes are divided into two domains: Bacteria and Archaea. A third domain, Eukaryota, consists of organisms with nuclei. Prokaryotes evolved before eukaryotes, and lack nuclei, mitochondria, and most of the other distinct organelles that characterize the eukaryotic cell. Some unicellular prokaryotes, such as cyanobacteria, form colonies held together by biofilms, and large colonies can create multilayered microbial mats. Prokaryotes are asexual, reproducing via binary fission. Horizontal gene transfer is comm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Julian Nowak
Julian Ignacy Nowak (; 10 March 1865 – 7 November 1946) was a Polish microbiologist and politician who served as 9th Prime Minister of Poland in 1922. Nowak studied medicine at the Jagiellonian University in 1886–1893 and was a professor there since 1899. In 1921–1922 he was a rector of the university. Being a conservative politician, he served as the Prime Minister briefly in 1922. In the same year, he also served briefly as the Minister of Religious Affairs. In 1922–1927 he was a Senator in the Polish Senate. He was awarded the Commander's Cross of the Order of Polonia Restituta The Order of Polonia Restituta (, ) is a Polish state decoration, state Order (decoration), order established 4 February 1921. It is conferred on both military and civilians as well as on alien (law), foreigners for outstanding achievements in .... Julian Ignacy Nowak was buried in Rakowicki Cemetery. He was the father of Olympic fencer Wanda Dubieńska. 1865 births 1946 dea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albert Bernhard Frank
Albert Bernhard Frank (17 January 1839 – 27 September 1900) was a German botanist, plant pathologist, and mycologist, born in Dresden. He is credited with coining the term ''mycorrhiza'' in his 1885 paper "". Frank was commissioned to develop practical methods for truffle cultivation by the King of Prussia (Wilhelm I). Although this project was not successful, it led to his elucidation of the nature and development of mycorrhizae. The history and impacts of Frank's work on mycorrhizae were reviewed by Trappe. The bacterial genus '' Frankia'' and family '' Frankiaceae'' were named after him.Prokaryotic symbionts in plants by Katharina Pawlowskip. 107/ref> In 1877, Albert Frank coined the term "symbiosis" () to describe the nature of lichens. He died in Berlin. Works * ''Pflanzen-Tabellen zur leichten, schnellen und sicheren Bestimmung der höheren Gewächse Nord-und Mittel-Deutschlands, nebst 2 besonderen Tabellen zur Bestimmung der deutschen Holzgewächse nach dem Laube, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleuropneumonia
Pleuropneumonia is inflammation of the lungs and pleura, pleurisy Pleurisy, also known as pleuritis, is inflammation of the membranes that surround the lungs and line the chest cavity (Pulmonary pleurae, pleurae). This can result in a sharp chest pain while breathing. Occasionally the pain may be a constant d ... being the inflammation of the pleura alone. See also * Contagious bovine pleuropneumonia – a disease in cattle * Contagious caprine pleuropneumonia – a disease in goats References Respiratory diseases {{respiratory-disease-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ribosome
Ribosomes () are molecular machine, macromolecular machines, found within all cell (biology), cells, that perform Translation (biology), biological protein synthesis (messenger RNA translation). Ribosomes link amino acids together in the order specified by the codons of messenger RNA molecules to form polypeptide chains. Ribosomes consist of two major components: the small and large ribosomal subunits. Each subunit consists of one or more ribosomal RNA molecules and many ribosomal proteins (). The ribosomes and associated molecules are also known as the ''translational apparatus''. Overview The sequence of DNA that encodes the sequence of the amino acids in a protein is transcribed into a messenger RNA (mRNA) chain. Ribosomes bind to the messenger RNA molecules and use the RNA's sequence of nucleotides to determine the sequence of amino acids needed to generate a protein. Amino acids are selected and carried to the ribosome by transfer RNA (tRNA) molecules, which enter the riboso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
