Bacteria That Require Oxygen

Bacteria-That-Require-Oxygen
Aerobes
require oxygen
use oxygen as a final electron acceptor
eg: Staphylococcus aureus
Microaerophiles
require limited amount of oxygen
The excess oxygen block activities of oxidative
enzymes > cause death
eg: Helicobacter pylori
Obligate anaerobes
require absence of oxygen
use other molecules as final electron acceptor
metabolise energy by anaerobic respiration or
fermentation
eg: Clostridium tetani
Facultative anaerobes
can grow in present / absence of oxygen
prefer use oxygen for growth
In oxygenpoor environment, cellular
respiration may occur anaerobically, utilizing
such compounds :
nitrates
sulfate
use sulfate & nitrates as final electron accertor
eg: Escherichia coli
Aerotolerant anaerobes
not use oxygen for growth
not killed by the presence of oxygen
not use oxygen as final electron acceptor
produce catalase or superoxide dismutase
fermentative organisms
eg: Lactobacillus
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