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[Antibiotic-induced pseudomembranous Clostridium difficile colitis. A new etiopathogenetically definable infectious
Abstract:
Pseudomembranous colitis has been recognized as a complication of antimicrobial therapy since 1952. Most recently, evidence has been accumulated showing that a heat labile toxin is involved. Though little is known so far about the normal ecology of C. difficile and the host factors of potential importance in the development of colitis by this anaerobe, antimicrobial agent-induced suppression of the normal gut flora seems to be a major factor leading to the intestinal proliferation of resistant toxinogenic C. difficile. Factors independent of susceptibility are, however, probably responsible for cases of pseudomembranous colitis associated with penicillin, ampicillin, and other antibiotics active against C. difficile. In monitoring antibiotic therapy, the application of selective media for the isolation of C. difficile from faecal specimens and proper tools for the demonstration of toxin and the study of immunity might prove to be fruitful from both a diagnostic and therapeutic viewpoint. In established pseudomembranous colitis treatment consists of oral vancomycin (2 g/day), cholestyramine and, if necessary, intensive intravenous regimen.
Insights
Pseudomembranous colitis, a complication of antibiotics, involves Clostridium difficile (C. difficile) toxin. Suppressing gut flora allows C. difficile proliferation, necessitating diagnostic tools and targeted treatments like vancomycin.
Area of Science:
- Gastroenterology
- Microbiology
- Infectious Diseases
Context:
- Pseudomembranous colitis is a known complication of antimicrobial therapy.
- Recent evidence implicates a heat-labile toxin in its pathogenesis.
- The normal gut ecology and host factors influencing C. difficile colitis are not fully understood.
Purpose:
- To review the factors contributing to antibiotic-associated pseudomembranous colitis.
- To highlight the role of Clostridium difficile (C. difficile) and its toxins.
- To discuss diagnostic and therapeutic strategies.
Summary:
- Antimicrobial-induced suppression of normal gut flora facilitates the proliferation of toxin-producing C. difficile.
- While gut flora disruption is a major factor, antibiotic-specific susceptibility may also play a role.
- Diagnostic tools for C. difficile isolation and toxin detection, alongside immune studies, are crucial.
Impact:
- Improved understanding of C. difficile pathogenesis in pseudomembranous colitis.
- Potential for enhanced diagnostic methods and targeted therapeutic interventions.
- In established cases, treatment involves vancomycin, cholestyramine, or intravenous regimens.