aerotolerant anaerobe

(noun)

an organism that does not require oxygen to sustain its metabolic processes, but is able to survive in the presence of oxygen

Related Terms

Examples of aerotolerant anaerobe in the following topics:

  • Microbial Growth Cycle

    • Conversely, obligate anaerobes are killed by oxygen and carry out fermentation.
    • Tetanus is an obligate anaerobe so it will infect areas where oxygen in limited.
    • Aerotolerant anaerobes breath anaerobically (without oxygen), but they are able to survive when oxygen is present.

  • Oxygen

    • Facultative anaerobes can use oxygen, but also have anaerobic (i.e. not requiring oxygen) methods of energy production.
    • Aerotolerant organisms can survive in the presence of oxygen, but they are anaerobic because they do not use it as a terminal electron acceptor.
    • An anaerobic organism or anaerobe is any organism that does not require oxygen for growth.
    • Aerotolerant organisms, which cannot use oxygen for growth, but tolerate the presence of it.
    • They require oxygen, but at a lower concentration. 5) Aerotolerant bacteria are not affected at all by oxygen, and they are evenly spread along the test tube.

  • Bacteroides and Flavobacterium

    • This genus of bacteria is characterized by their sphingolipid based membranes and are typically non-endospore forming and anaerobic.
    • The ability of the bacteroides to function in an anaerobic environment allow them to reside in the abdominal cavity in aerotolerant conditions.
    • An image of Bacteroides biacutus, an anaerobic bacterium present within the gastrointestinal tract.

  • Anoxic Hydrocarbon Oxidation

    • Anoxic hydrocarbon oxidation can be used to degrade toxic hydrocarbons, such as crude oil, in anaerobic environments.
    • Although it was once thought that hydrocarbon compounds could only be degraded in the presence of oxygen, the discovery of anaerobic hydrocarbon-degrading bacteria and pathways show that the anaerobic degradation of hydrocarbons occurs naturally.
    • Anaerobic oxidation of methane (AOM) is a microbial process that occurs in anoxic marine sediments.
    • It is estimated that almost 90% of all the methane that arises from marine sediments is oxidized anaerobically by this process.
    • Microbes may be used to degrade toxic hydrocarbons in anaerobic environments.

  • Electron Donors and Acceptors in Anaerobic Respiration

    • In anaerobic respiration, a molecule other than oxygen is used as the terminal electron acceptor in the electron transport chain.
    • Anaerobic respiration is the formation of ATP without oxygen.
    • Many different types of electron acceptors may be used for anaerobic respiration.
    • Organic compounds may also be used as electron acceptors in anaerobic respiration.
    • A molecule other than oxygen is used as the terminal electron acceptor in anaerobic respiration.

  • Syntrophy and Methanogenesis

    • Bacteria that perform anaerobic fermentation often partner with methanogenic archea bacteria to provide necessary products such as hydrogen.
    • A frequently cited example of syntrophy are methanogenic archaea bacteria and their partner bacteria that perform anaerobic fermentation.
    • Methanogenesis in microbes is a form of anaerobic respiration, performed by bacteria in the domain Archaea.
    • Without methanogenesis, a great deal of carbon (in the form of fermentation products) would accumulate in anaerobic environments.

  • Anammox

    • Anammox, an abbreviation for ANaerobic AMMonium OXidation, is a globally significant microbial process of the nitrogen cycle.
    • Anammox, an abbreviation for ANaerobic AMMonium OXidation , is a globally significant microbial process of the nitrogen cycle.
    • Since oxygen is not required for the process, these organisms are strict anaerobes.
    • Describe the overall process of ANaerobic AMMonium OXidation (Anammox) and its purpose

  • Methane-Producing Archaea: Methanogens

    • Methanogens are an important group of microoraganisms that produce methane as a metabolic byproduct under anaerobic conditions.
    • Methanogenic archaea, or methanogens, are an important group of microoraganisms that produce methane as a metabolic byproduct under anaerobic conditions.
    • Methanogens play a vital ecological role in anaerobic environments by removing excess hydrogen and fermentation products produced by other forms of anaerobic respiration.

  • Iron Oxidation

    • Ferric iron is an anaerobic terminal electron acceptor, with the final enzyme a ferric iron reductase.
    • Ferric iron (Fe3+) is a widespread anaerobic terminal electron acceptor both for autotrophic and heterotrophic organisms.
    • Ferrous iron is a soluble form of iron that is stable at extremely low pHs or under anaerobic conditions.
    • The third type of iron-oxidizing microbes is anaerobic photosynthetic bacteria such as Rhodopseudomonas, which use ferrous iron to produce NADH for autotrophic carbon dioxide fixation.
    • Outline the purpose of iron oxidation and the three types of ferrous iron-oxidizing microbes (acidophiles, microaerophiles and anaerobic photosynthetic bacteria)

  • Fusobacteria

    • Fusobacterium are anaerobic, non-spore forming, gram-negative bacteria that are associated with periodontal disease and Lemierre's syndrome.
    • Fusobacteria are rod-shaped bacilli capable of thriving in anaerobic conditions.
    • At this point, bacteria which are capable of thriving in anaerobic conditions, such as Fusobacterium necrophorum can flourish deep in the abscess.