2: Obligate anaerobes are poisoned by oxygen, so they gather at the bottom of the tube where the oxygen concentration is lowest. Source: Internet
The least common were infections caused exclusively by anaerobes and facultative organisms. Source: Internet
Unlike obligate anaerobes however, they are not poisoned by oxygen. Source: Internet
Yeast species either require oxygen for aerobic cellular respiration ( obligate aerobes ) or are anaerobic, but also have aerobic methods of energy production ( facultative anaerobes ). Source: Internet