Necrotizing fasciitis pathophysiology: Difference between revisions
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==Pathophysiology== | |||
“Flesh-eating bacteria” is a misnomer, as the bacteria do not actually eat the tissue. They cause the destruction of skin and muscle by releasing [[toxin]]s (virulence factors). These include streptococcal pyogenic exotoxins and [[Streptococcus pyogenes|other virulence factors]]. ''S. pyogenes'' produces an exotoxin known as a [[superantigen]]. This toxin is capable of activating [[T-cell]]s non-specifically. This causes the over-production of [[cytokines]] that over-stimulate [[macrophage]]s. The macrophages cause the actual tissue damage by releasing oxygen [[free radicals]] that are normally intended to destroy bacteria but are capable of damaging nearly any macromolecule they contact in the body. | |||
==References== | ==References== | ||
Revision as of 20:39, 13 August 2015
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Pathophysiology
“Flesh-eating bacteria” is a misnomer, as the bacteria do not actually eat the tissue. They cause the destruction of skin and muscle by releasing toxins (virulence factors). These include streptococcal pyogenic exotoxins and other virulence factors. S. pyogenes produces an exotoxin known as a superantigen. This toxin is capable of activating T-cells non-specifically. This causes the over-production of cytokines that over-stimulate macrophages. The macrophages cause the actual tissue damage by releasing oxygen free radicals that are normally intended to destroy bacteria but are capable of damaging nearly any macromolecule they contact in the body.