Gangrene is the death of tissue followed by consumption by pathogens, usually bacteria. When any living tissue gets injured and if healing and repair is impossible, the tissue will die. This is known as necrosis. If the tissue is not discarded or the body cannot wall it off, bacteria will begin to consume this dead tissue and this is known as putrefaction. Gangrene is not separate from the body, but rather when the decomposing area lies adjacent or in continuity with the living tissue surrounding it, thereby running the risk of causing death to this healthy tissue.
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