Clostridia

The Clostridia are a class of Firmicutes, including Clostridium and other similar genera. They are distinguished from the Bacilli by lacking aerobic respiration. 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.

Notable species of this Class include; Some of the enzymes produced by this group are used in bioremediation.
 * Clostridium perfringens (Gangrene,Food Poisoning)
 * Clostridium difficile   (Colitis)
 * Clostridium tetani      (Tetanus)
 * Clostridium botulinum   (Botulism)
 * Clostridium acetobutylicum

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