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A colony of Escherichia coli [111] Unlike in multicellular organisms, increases in cell size (cell growth) and reproduction by cell division are tightly linked in unicellular organisms. Bacteria grow to a fixed size and then reproduce through binary fission, a form of asexual reproduction. [112]
Bacteriology is the branch and specialty of biology that studies the morphology, ecology, genetics and biochemistry of bacteria as well as many other aspects related to them. This subdivision of microbiology involves the identification, classification, and characterization of bacterial species. [1] Because of the similarity of thinking and ...
Bacterial taxonomy is the classification of strains within the domain Bacteria into hierarchies of similarity. This classification is similar to that of plants, mammals, and other taxonomies. However, biologists specializing in different areas have developed differing taxonomic conventions over time.
Gram-positive bacteria. Rod-shaped gram-positive Bacillus anthracis bacteria in a cerebrospinal fluid sample stand out from round white blood cells, which also accept the crystal violet stain. In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify ...
v. t. e. A microorganism, or microbe, [a] is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells. The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from sixth century BC India.
Pathogenic bacteria. Neisseria gonorrhoeae (small red dots) in pus from a man with a urethral discharge (Gram stain) Pathogenic bacteria are bacteria that can cause disease. [1] This article focuses on the bacteria that are pathogenic to humans. Most species of bacteria are harmless and are often beneficial but others can cause infectious diseases.
Gram-negative bacteria are bacteria that, unlike gram-positive bacteria, do not retain the crystal violet stain used in the Gram staining method of bacterial differentiation. [1] Their defining characteristic is their cell envelope, which consists of a thin peptidoglycan cell wall sandwiched between an inner (cytoplasmic) membrane and an outer ...
Fruiting gliding bacteria Hydrobacteria "Deferrisomatota" Desulfobacterota C Hydrobacteria "Deferrimicrobiota" Begmatov et al. 2022 Desulfobacterota E "Tharpellota" Hydrobacteria "Moduliflexota" corrig. Sekiguchi et al. 2015 KSB3 Hydrobacteria "Methylomirabilota" Viljakainen & Hug 2021ex Chuvochina et al. 2023 NC10 "Rokubacteria" (CSP1-6 ...