Aerotolerant anaerobe

Definition

An aerotolerant anaerobe is a microorganism that does not require oxygen for growth but can tolerate its presence. These organisms use fermentation to produce energy.

5 Must Know Facts For Your Next Test

1. Aerotolerant anaerobes grow equally well in the presence or absence of oxygen.
2. They do not use oxygen for respiration and rely on fermentation pathways.
3. Lactobacillus species are common examples of aerotolerant anaerobes.
4. Unlike obligate anaerobes, they are not harmed by the presence of oxygen.
5. They possess enzymes like superoxide dismutase that help mitigate oxidative stress.

Review Questions

Related terms

Obligate Anaerobe: A microorganism that cannot grow in the presence of oxygen.

Facultative Anaerobe: A microorganism that can use oxygen for growth but also grows without it by switching to fermentation or anaerobic respiration.

Microaerophile: A microorganism that requires low levels of oxygen for growth but cannot tolerate atmospheric levels.