Clostridia

RANK: Class

TAXONOMY: cellular organisms -> Bacteria -> Terrabacteria group -> Firmicutes -> Clostridia

OVERVIEW:

The 'Clostridia' are a highly polyphyletic class of Firmicutes, including Clostridium and other similar genera. They are distinguished from the Bacilli by lacking aerobic respiration. They are obligate anaerobes and oxygen is toxic to them. Species of the genus Clostridium are all Gram-positive and have the ability to form spores. Studies show they are not a monophyletic group, and their relationships are not entirely certain. Currently most are placed in a single order called Clostridiales, but this is not a natural group and is likely to be redefined in the future. Most species of the genus Clostridium are saprophytic organisms found in many places in the environment, most notably the soil. However, the genus does contain some human pathogens (outlined below). The toxins produced by certain members of the Clostridium genus are among the most dangerous known. Examples are tetanus toxin (known as tetanospasmin) produced by C. tetani and botulinum toxin produced by C. botulinum. Some species have been isolated from women with bacterial vaginosis. Notable species of this class include: *Clostridium perfringens (Gangrene, Food poisoning) *Clostridium difficile (Pseudomembranous colitis) *Clostridium tetani (Tetanus) *Clostridium botulinum (Botulism) *Clostridium acetobutylicum *Clostridium haemolyticum *Clostridium novyi *Clostridium novyi Clostridium oedematiens Heliobacteria are also members of the class Clostridia. Some of the enzymes produced by this group are used in bioremediation.


Pathogen
Flora/ commensal
Butyrate producer
Microbial Abundance Data: Clostridia
Percent of total population with standard deviation [PMID: 22698087]. Percentages > 1% highlighted.
Buccal
Mucosa
Keratinized
Gingiva
Hard
Palate
Throat
Tonsils
Saliva
Stool
5.281 %
(4.594)
6.242 %
(6.894)
10.694 %
(6.325)
17.399 %
(8.213)
17.482 %
(7.194)
24.507 %
(9.586)
28.642 %
(18.687)
Name
Rank
Client %
Avg %
Avg StdDev
Client StdDev
Clostridia
class
50.01
28.642
18.687
+1
DESCENDANTS
METABOLOMICS