Give an account on respiration types of bacteria.

Explanation

Two types of respiration is found in bacteria. They are :
1. Aerobic respiration `" "` 2. Anaerobic respiration
1. Aerobic respiration : These bacteria require oxygen as terminal acceptor and will not grow under anaerobic conditions (i.e, in the absence of `O_2`) Example : Streptococcus.
Obligate aerobes : Some Micrococcus species are obligate aerobes (i.e., they must have oxygen to survive).
2. Anaerobic respiration : These bacteria do not use oxygen for growth and metabolism but obtain their energy from fermentation reactions. Example : Clostridium.
Facultative anaerobes : There are bacteria that can grow either using oxygen as a terminal electron accepotor or anaerobically using fermentation reaction to obtain energy. when a facultative anaerobe such as E.coli. is present at a site of infection like an abdominal abscess, it can rapidly consume all avialable `O_2` and change to anaerobic metabolism producing an anaerobic environment and thus allow the anaerobic bacteria that are present to grow and cause disease. Example: Escherichila coli and Salmonella.
Capnophilic bacteria : Bacteria which require `CO_2` for their growth are called as capnophilic bacteria. Example : Campylobacter.