Indication

Intra-abdominal anaerobic abscess

An intra-abdominal anaerobic abscess is a localized, encapsulated collection of purulent exudate, cellular debris, and non-spore-forming or spore-forming anaerobic bacteria within the peritoneal, retroperitoneal, or visceral abdominal compartments. Read more about Intra-abdominal anaerobic abscess

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About Intra-abdominal anaerobic abscess.

An intra-abdominal anaerobic abscess is a localized, encapsulated collection of purulent exudate, cellular debris, and non-spore-forming or spore-forming anaerobic bacteria within the peritoneal, retroperitoneal, or visceral abdominal compartments.

It typically develops as a secondary complication following disruption of the gastrointestinal mucosal barrier, such as through hollow viscus perforation, appendicitis, diverticulitis, penetrating trauma, or surgical anastomotic dehiscence.

Pathophysiologically, the infection is characteristically polymicrobial, driven by obligate anaerobes—most commonly *Bacteroides fragilis* alongside *Clostridium* or *Peptostreptococcus* species—that flourish in a hypoxic, acidotic microenvironment walled off by fibrin, collagen, and adjacent structures such as the omentum.

Clinically, affected patients present with localized abdominal pain, persistent fever, leukocytosis, and tenderness, which can progress to generalized peritonitis or life-threatening systemic sepsis if source control and targeted therapy are delayed.

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