Antibiotic-associated colitis caused by Clostridium difficile: relapse and risk factors

Area of Science:

• Infectious Diseases
• Gastroenterology
• Microbiology

Background:

• Antibiotic-associated colitis frequently results in Clostridium difficile relapse.
• Persistent Clostridium difficile in stools post-treatment may lead to relapse.
• Understanding predisposing factors for relapse is crucial for effective management.

Purpose of the Study:

• To identify factors predisposing patients to Clostridium difficile colitis relapse.
• To evaluate if prolonged antibiotic treatment, aiming for pathogen eradication, prevents relapse.

Main Methods:

• Sixty patients with antibiotic-associated colitis were studied; 36 received treatment.
• Treatment with vancomycin or bacitracin continued until stool tests for Clostridium difficile and cytotoxin were negative.
• Patients were followed for one month post-treatment to monitor for relapse.

Main Results:

• Relapse occurred in 28.6% of treated patients; Clostridium difficile reappeared in stools of an additional 20% without symptoms.
• Older age (mean 67.3 years) and recent abdominal surgery (59%) were significant risk factors for relapse.
• Prolonging treatment to eradicate Clostridium difficile was not effective in preventing relapse and was costly.

Conclusions:

• Extended antibiotic therapy to clear Clostridium difficile from stools does not prevent relapse.
• Elderly patients and those with a history of recent abdominal surgery are at increased risk of relapse.
• Current treatment strategies may require re-evaluation for preventing recurrent Clostridium difficile infections.