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Bacterial cellular morphologies are the shapes that are characteristic of various types of bacteria and often key to their identification. Their direct examination under a light microscope enables the classification of these bacteria (and archaea). Generally, the basic morphologies are spheres (coccus) and round-ended cylinders or rod shaped ...
English: Basic morphological differences between bacteria. The most often found forms and their associations. The most often found forms and their associations. Français : Formes bactériennes les plus courantes et leurs associations.
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.
Cell shape is generally characteristic of a given bacterial species, but can vary depending on growth conditions. Some bacteria have complex life cycles involving the production of stalks and appendages (e.g. Caulobacter) and some produce elaborate structures bearing reproductive spores (e.g. Myxococcus, Streptomyces).
Bacterial morphological plasticity refers to changes in the shape and size that bacterial cells undergo when they encounter stressful environments. Although bacteria have evolved complex molecular strategies to maintain their shape, many are able to alter their shape as a survival strategy in response to protist predators, antibiotics, the immune response, and other threats.
The name Cytobacillus can be broken down into the prefix "cyto-" (from the Greek noun kytos, referring to hollow, vessel, jar or a cell in biology) and the suffix "-bacillus" (from the Latin noun bacillus, referring to a small staff or rod and Bacillus, the bacterial genus). Together, Cytobacillus refers to a rod-shaped cell.
The phylum Bacteroidota (synonym Bacteroidetes) is composed of three large classes of Gram-negative, nonsporeforming, anaerobic or aerobic, and rod-shaped bacteria that are widely distributed in the environment, including in soil, sediments, and sea water, as well as in the guts and on the skin of animals.
Flavobacteriia are a type of gram-negative rod-shaped bacteria with sizes typically ranging from 0.1μm to 0.5μm wide and 2μm to 5μm long. [6] [22] Depending on the species of Flavobacteriia, the genome size can range from 1.85x10 9 daltons to 3.9x10 9 daltons. [23] Flavobacteriia are also unable to form endospores. [22]