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Priestia megaterium [1] (Bacillus megaterium prior to 2020) [2] is a rod-like, Gram-positive, mainly aerobic, spore forming bacterium found in widely diverse habitats. [3] [4] It has a cell length up to 100 μm and a diameter of 0.1 μm, which is quite large for bacteria. [5]
[1] [2] The type species of this genus is Priestia megaterium. [3] Members of Priestia are previously species belonging to Bacillus, a genus that has been recognized as displaying extensive polyphyly within its members due to the vague criteria [4] used to assign species to this clade.
Bacillus (Latin "stick") is a genus of Gram-positive, rod-shaped bacteria, a member of the phylum Bacillota, with 266 named species.The term is also used to describe the shape (rod) of other so-shaped bacteria; and the plural Bacilli is the name of the class of bacteria to which this genus belongs.
Bacillus megaterium for example, synthesizes a capsule composed of polypeptide and polysaccharides. Bacillus anthracis; Streptococcus pyogenes synthesizes a hyaluronic acid capsule. Streptococcus pneumoniae [20] has at least 91 different capsular serotypes. [21] These serotypes are the basis for the pneumococcal vaccines.
Megaterium is a specific name used for several taxa of bacterium: Aquimarina megaterium, a bacterium from seawater; Bacillus megaterium, a bacterium found in many habitats; Gemmobacter megaterium, a bacterium from planktonic seaweed; Marinospirillum megaterium, a bacterium from fermented brine
Bacillus. Bacillus anthracis; Bacillus brevis; Bacillus cereus; Bacillus fusiformis; Bacillus licheniformis; Bacillus megaterium; Bacillus mycoides; Bacillus ...
An example of this would be Colletotrichum fioriniae, which is an endophyte of many temperate broadleaved trees and shrubs, ... and Bacillus megaterium. ...
Examples of bacteria having terminal endospores include Clostridium tetani, the pathogen that causes the disease tetanus. Bacteria having a centrally placed endospore include Bacillus cereus. Sometimes the endospore can be so large the cell can be distended around the endospore. This is typical of Clostridium tetani.