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Anaerobi

Un anaerobi (del grec ἄν- [prefix negatiu], ἀήρ "aire" i βίος "vida") és l'organisme que es desenvolupa en absència d'oxigen lliure.

Tipus

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Segons la seva tolerància a l'oxigen se'n diferencien tres tipus:

  • Anaerobis estrictes: Moren en presència d'oxigen.
  • Anaerobis facultatius: Poden utilitzar l'oxigen quan hi és present.
  • Aerotolerants: Poden viure en contacte amb l'oxigen, però no poden aprofitar-se'n.

Metabolisme

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Els organismes anaeròbics poden tenir dos tipus de metabolisme:

  • la fermentació com per exemple S. pyogenes que és aerotolerant i es troba en el tracte respiratori o com G. lamblia que fa una fermentació de la glucosa
  • la respiració anaeròbica com és el cas de M. formicicum i que és un anaerobi estricte.
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Anaerobi
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