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Alkalihalobacillus clausii (synonym Bacillus clausii) is a rod-shaped, motile, and spore-forming bacterium that lives in the soil but is also a natural microbiota of the mammalian gastrointestinal tract.
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.
Solibacillus is a genus of Gram positive, rod shaped, spore-forming bacteria. The first member of Solibacillus was first isolated in 1999, and was originally called Bacillus silvestris. However, further studies on B. silvestris found that the organism belonged in a separate genus.
Clostridium perfringens (formerly known as C. welchii, or Bacillus welchii) is a Gram-positive, bacillus (rod-shaped), anaerobic, spore-forming pathogenic bacterium of the genus Clostridium. [ 1 ] [ 2 ] C. perfringens is ever-present in nature and can be found as a normal component of decaying vegetation, marine sediment , the intestinal tract ...
B. licheniformis is a Gram positive, spore-forming, facultative anaerobic, rod-shaped bacterium. [5] [6] It was initially named Clostridium licheniforme by H. Weigmann [7] and renamed Bacillus licheniformis by Frederick D. Chester. [8]
The spore-forming bacteria can again be divided based on their respiration: Bacillus is a facultative anaerobe, while Clostridium is an obligate anaerobe. [18] Also, Rathybacter , Leifsonia , and Clavibacter are three gram-positive genera that cause plant disease.
B. subtilis cells are typically rod-shaped, and are about 4–10 micrometers (μm) long and 0.25–1.0 μm in diameter, with a cell volume of about 4.6 fL at stationary phase. [6] [11] As with other members of the genus Bacillus, it can form an endospore, to survive extreme environmental conditions of temperature and desiccation. [12]
The specific name, cereus, meaning "waxy" in Latin, refers to the appearance of colonies grown on blood agar. Some strains are harmful to humans and cause foodborne illness due to their spore-forming nature, while other strains can be beneficial as probiotics for animals, and even exhibit mutualism with certain plants.