Aerotolerant Anaerobe

Aerotolerant Anaerobe

Microbiology An anaerobe that grows poorly in O2 and is “happier” under anaerobic conditions—e.g., Clostridium carnis, C histolyticum, C tertium. See Anaerobe. Cf Aerobe.
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However, should the cell suffer a long-term stress, it becomes an aerotolerant anaerobe (6,7) and continues to live through a process called fermentation even if oxygen is present.
While it is true that a normal cell living by anaerobiasis can return to normal with the return of respiration, (9,10) an aerotolerant anaerobe cannot, due to injured mitochondria.
The disease is caused by a common bacterium, Streptococcus pneumoniae, or pneumococcus, a gram-positive, alpha-hemolytic, bile soluble aerotolerant anaerobe, which can attack different parts of the body.