Members of this family are facultative anaerobes, able to ferment sugars to lactic acid, have nitrate reductase, but lack oxidases.
23.
Facultative anaerobes can switch between fermentation and different terminal electron acceptors depending on the environmental conditions in which they find themselves.
24.
A facultative anaerobe can tolerate anaerobic and aerobic conditions; however, an obligate anaerobe would die in the presence of even trace levels of oxygen
25.
Certain eukaryotes are also facultative anaerobes, including fungi such as " Saccharomyces cerevisiae " and many aquatic invertebrates such as Nereid ( worm ) polychaetes.
26.
It belongs to the Thermoplasmata, which thrive in acidic and high-temperature environments . " Thermoplasma " are facultative anaerobes and respire using sulfur and organic carbon.
27.
The species are facultative anaerobes, and most strains can survive with citrate and glucose as their sole carbon sources and ammonia as their sole nitrogen source.
28.
Facultative anaerobes can be active at positive Eh values, and at negative Eh values in the presence of oxygen bearing inorganic compounds, such as nitrates and sulfates.
29.
This species is also acidophilic, viable at very low pH . The probiotic " P . acidilactici " is a facultative anaerobe with lesser sensitivity to oxygen.
30.
Whereas oxygen kills clostridia, the enteric bacteria are facultative anaerobes; they grow very quickly when oxygen is available and transition progressively from aerobic to anaerobic metabolism as oxygen becomes depleted.
