Facultative Anaerobic Bacteria: Bacteria that can survive both with and without oxygen.

In one embodiment, undesirable anaerobic and facultative anaerobic bacteria are killed at a greater rate than desirable soil compatible aerobic bacteria.

(In technical terms, these are gram-positive, facultatively anaerobic, usually unencapsulated cocci.)

(In technical terms, these are gram-positive, facultative anaerobic, usually unencapsulated cocci).

(In technical terms, these are gram-positive, facultative anaerobic, usually unencapsulated cocci.)

Paenibacillus is a facultative anaerobic bacterium, in other words, the bacterium can flourish both in the presence and absence of oxygen.

It is an optional aero-anaerobic bacterium: a small amount of oxygen is preferable to its development, but it can do without it.

S. pyogenes is considered a facultative anaerobic bacterium, which means it can grow in the presence or absence of oxygen.

One of the most acid-forming bacteria is the Streptococcus mutans, an optional anaerobic bacterium that can convert sugar into lactic acid in a very short time.

It is an optional aero-anaerobic bacterium: a small amount of oxygen is preferable to its development, but it can do without it.

5]. (a-h) Illustrations of various steps describing the transition from an H2-dependent Archaea host cell (red) to an optional anaerobic protein bacteria (blue) to a eukaryotic cell.

These organisms are described as facultatively anaerobic.