Scientific classification
Kingdom: Bacteria
Phylum: Firmicutes
Class: Clostridia


The Clostridia (sulfite-reducing bacteria) are a 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 to man. Examples are tetanus toxin (known as tetanospasmin) produced by C. tetani and botulinum toxin produced by C. botulinum.

Notable species of this class include:

Heliobacteria are also members of the class Clostridia.

Some of the enzymes produced by this group are used in bioremediation.

See also


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Clostridia — Clostridium botulinum Systematik Klassifikation: Lebewesen Domäne …   Deutsch Wikipedia

  • Clostridia —   Clostridia …   Wikipedia Español

  • Clostridia — Clostridia …   Wikipédia en Français

  • clostridia — clostridium clostridium n. {clostridia} 1. spindle shaped bacterial cell esp. one swollen at the center by an endospore. Syn: clostridia. [WordNet 1.5] 2. [capitalized] a genus of anaerobic, spore forming motile bacteria of the family… …   The Collaborative International Dictionary of English

  • clostridia — Plural of clostridium. * * * Clos·tri·dia (klos tridґe ə) a class of bacteria of the phylum Firmicutes, consisting of gram positive or gram negative, aerobic to anaerobic rods or cocci; some are thermophilic and a number are pathogenic.… …   Medical dictionary

  • clostridia — n. type of rod shaped anaerobic bacteria …   English contemporary dictionary

  • clostridia — noun spindle shaped bacterial cell especially one swollen at the center by an endospore • Syn: ↑clostridium • Hypernyms: ↑eubacteria, ↑eubacterium, ↑true bacteria • Member Holonyms: ↑genus Clostridium …   Useful english dictionary

  • Liste d'espèces eubactériennes dont le génome est séquencé — Cette liste d espèces eubactériennes dont le génome est séquencé (qui peut ne pas être à jour) présente une liste d espèces d Eubacteria dont le génome a été séquencé. La plupart de ces séquences ont été publiées dans des bases de données… …   Wikipédia en Français

  • Clostridium — SEM micrograph of Clostridium difficile colonies from a stool sample. Scientific classification Domain …   Wikipedia

  • Clostridium novyi — Scientific classification Kingdom: Bacteria Phylum: Firmicutes Class: Clostridia …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”