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An anaerobic organism capable of surviving or growing despite the presence of oxygen.


An aerotolerant is considered an anaerobe since it does not use oxygen to oxidize molecules during energy production.

Aerotolerant organisms are strictly fermentative.

Word origin: Greek āero-, from āēr, air + French tolérant, from Latin tolerāns, present participle of tolerāre, to bear.

See also: facultative anaerobe, microaerophile, obligate anaerobe.