Survey of motile microaerophilic bacterial morphotypes in the oxygen gradient above a marine sulfidic sediment. (1/1)
Enrichment cultures for free-swimming microaerophilic bacteria were prepared from marine sulfidic sediment samples (Niva Bay, Denmark). We observed nine different morphotypes; three of these morphotypes represented already-described species, i.e., Thiovulum majus, "Candidatus Ovobacter propellens," and an as-yet-unnamed large vibrioid bacterium. In addition, we observed several morphotypes of spirilla and one vibrioid morphotype. A common feature of all investigated bacteria was that they aggregated chemotactically at the oxic-anoxic interface, whereas preferred oxygen concentration were in the range of 1 to 10 muM. The motile behavior and flagellar dynamics are analyzed in detail with an emphasis on spirilla. (+info)Spirillaceae is a family of Gram-negative, spiral-shaped or curved bacteria belonging to the order Neisseriales, which includes the genera Spirillum and Cry Havensia, known to cause wound infections and occasionally opportunistic infections in humans.
Spirillaceae is a family of proteobacteria that are characterized by curved or spiral-shaped cells. The members of this family are gram-negative, motile bacteria that typically have one or more flagella at each end of the cell (polar flagellation). Some notable genera in this family include Spirillum and Cry Havsenula. These bacteria are commonly found in aquatic environments and can cause disease in humans and animals, such as spirillosis and leptospirosis. However, it's important to note that the taxonomy of proteobacteria is complex and constantly updated, so the exact definition and composition of Spirillaceae may vary depending on the source.
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Encyclopedia of Life
Spirillaceae; Nitrosomonadales; Betaproteobacteria; Proteobacteria (Purple Bacteria & relatives); Spirillum; Bacteria; Life ( ... Spirillaceae; Nitrosomonadales; Betaproteobacteria; Proteobacteria (Purple Bacteria & relatives); Spirillum; Bacteria; Life ( ... Spirillaceae; Nitrosomonadales; Betaproteobacteria; Proteobacteria (Purple Bacteria & relatives); Spirillum; Bacteria; Life ( ... Spirillaceae; Nitrosomonadales; Betaproteobacteria; Proteobacteria (Purple Bacteria & relatives); Spirillum; Bacteria; Cellular ...
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Syphilis
In 2012 about 0.5% of adults were infected with syphilis with 6 million new cases.[5] In 1999 it is believed to have infected 12 million additional people, with greater than 90% of cases in the developing world.[12] It affects between 700,000 and 1.6 million pregnancies a year, resulting in spontaneous abortions, stillbirths, and congenital syphilis.[4] During 2010 it caused about 113,000 deaths down from 202,000 in 1990.[6] In sub-Saharan Africa, syphilis contributes to approximately 20% of perinatal deaths.[4] Rates are proportionally higher among intravenous drug users, those who are infected with HIV, and men who have sex with men.[8][9][10] In the United States, rates of syphilis as of 2007 were six times greater in men than women; they were nearly equal in 1997.[42] African Americans accounted for almost half of all cases in 2010.[43] As of 2014, syphilis infections continue to increase in the United States.[44]. Syphilis was very common in Europe during the 18th and 19th centuries.[7] ...
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