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Updated: Aug 16, 2026

Colon Ascendens Stent Peritonitis (CASP) - a Standardized Model for Polymicrobial Abdominal Sepsis
Published on: December 18, 2010
Intra-abdominal sepsis: controversies and choices in management
1Department of Surgery, Tulane University School of Medicine, New Orleans, Louisiana.
Abstract:
Contamination of the peritoneal cavity may lead to generalized peritonitis or abscess formation. Both aerobic and anaerobic bacteria participate in the infectious process. The concentration and the particular mix of aerobes and anaerobes depends on the site of perforation, with the highest concentrations and greatest predominance of anaerobes in the colon. A number of factors contribute to the risk of infection, and a formula has been devised for calculating a given patient's risk for infection following intestinal perforation secondary to penetrating abdominal trauma. The goal of therapy is to reduce morbidity, mortality, and duration of hospital stay. Specific techniques used to achieve this goal are controversial. In essence, the keys to successful management of intra-abdominal sepsis are early diagnosis and surgical intervention, supplemented by systemic antibiotics that are effective against the aerobic and anaerobic components. Considerations in choosing antibiotics are efficacy, safety, and cost-effectiveness. Some second-generation and third-generation cephalosporins often offer an effective, safer, and more economical alternative to antibiotic combinations.
Insights
Intra-abdominal infections, often caused by aerobic and anaerobic bacteria, require prompt diagnosis and surgical intervention. Effective antibiotic therapy, such as cephalosporins, is crucial for managing peritonitis and abscesses, improving patient outcomes.
Area of Science:
- Infectious Diseases
- Surgical Gastroenterology
- Microbiology
Background:
- Peritoneal contamination can result in generalized peritonitis or abscess formation.
- Both aerobic and anaerobic bacteria are implicated in intra-abdominal infections.
- Bacterial concentrations and types vary by perforation site, with the colon having the highest anaerobic load.
Purpose of the Study:
- To outline the management of intra-abdominal sepsis following intestinal perforation.
- To highlight the importance of early diagnosis and surgical intervention.
- To discuss antibiotic selection criteria for effective treatment of polymicrobial infections.
Main Methods:
- Review of factors contributing to infection risk after intestinal perforation.
- Discussion of therapeutic goals: reducing morbidity, mortality, and hospital stay.
- Analysis of antibiotic choices, focusing on efficacy, safety, and cost-effectiveness.
Main Results:
- A risk assessment formula for infection following penetrating abdominal trauma has been developed.
- Second- and third-generation cephalosporins are presented as effective, safe, and economical antibiotic options.
- Successful management hinges on early diagnosis, surgical intervention, and appropriate antibiotic coverage.
Conclusions:
- Optimal management of intra-abdominal sepsis involves a multi-faceted approach.
- Antibiotic therapy should target both aerobic and anaerobic bacteria.
- Cephalosporins offer a favorable risk-benefit profile for treating these infections.
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