Inciting and etiologic agents of colitis

Area of Science:

• Microbiology
• Gastroenterology
• Pharmacology

Background:

• Clostridium difficile (C. difficile) is a significant cause of infectious diarrhea and colitis.
• Drug-induced enterocolitis is a recognized clinical problem.
• The role of various agents in inducing C. difficile colitis requires further elucidation.

Purpose of the Study:

• To identify drugs and other factors associated with Clostridium difficile colitis.
• To investigate the role of inducing agents in a hamster model of colitis.

Main Methods:

• Analysis of 3,115 stool samples from patients with drug-related diarrhea.
• Diagnosis of C. difficile colitis in 130 patients.
• Use of a hamster model to test inducing agents like antibiotics, cytotoxic drugs, diet alterations, and cathartics.

Main Results:

• Antibiotics (ampicillin, cephalosporins, clindamycin, aminoglycosides) were most commonly implicated in C. difficile colitis.
• A high-protein diet and cefazolin administration shortened survival time in hamsters.
• Castor oil and vegetable oil improved survival against clindamycin-induced colitis, while Milk of Magnesia and mineral oil did not.
• Methotrexate induced C. difficile cecitis in hamsters, preventable by folinic acid or vancomycin.

Conclusions:

• A wide range of factors, including antibiotics, antineoplastic agents, cathartics, and dietary modifications, can induce C. difficile colitis.
• The hamster model is useful for studying the pathogenesis of C. difficile colitis.
• Understanding these triggers is crucial for preventing and managing C. difficile infections.