How does abscess formation occur in peritonitis and abdominal sepsis?

Updated: Jul 23, 2019
  • Author: Brian J Daley, MD, MBA, FACS, FCCP, CNSC; Chief Editor: Praveen K Roy, MD, AGAF  more...
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Abscess formation occurs when the host defense is unable to eliminate the infecting agent and attempts to control the spread of this agent by compartmentalization. This process is aided by a combination of factors that share a common feature, ie, impairment of phagocytotic killing. Most animal and human studies suggest that abscess formation occurs only in the presence of abscess-potentiating agents. Although the nature and spectrum of these factors have not been studied exhaustively, certain fiber analogues (eg, bran) and the contents of autoclaved stool have been identified as abscess-potentiating agents. In animal models, these factors inhibit opsonization and phagocytotic killing by interference with complement activation.

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