What is Pseudomembranous Colitis?

Pseudomembranous Colitis is an inflammatory condition of the colon characterized by the formation of pseudomembranes—yellow-white plaques on the mucosal surface. It is most commonly associated with an overgrowth of Clostridioides difficile (C. diff) bacteria, often following antibiotic use.

Causes and Risk Factors

• Antibiotic Use: Broad-spectrum antibiotics like clindamycin, cephalosporins, penicillins, and fluoroquinolones can disrupt normal gut flora, allowing C. diff to proliferate.
• Hospitalization or Long-Term Care: Increased exposure to C. diff spores in healthcare settings.
• Age: Individuals over 65 are at higher risk.
• Weakened Immune System: Conditions like cancer, HIV/AIDS, or immunosuppressive therapy.
• Previous C. diff Infection: History of infection increases recurrence risk.

Symptoms

• Watery diarrhea (often more than three times a day)
• Abdominal cramps and tenderness
• Fever
• Nausea
• Loss of appetite
• Dehydration
• In severe cases, presence of blood or pus in stool

Diagnosis

• Stool Tests: Detect toxins produced by C. diff.
• Blood Tests: Check for elevated white blood cell count.
• Colonoscopy or Sigmoidoscopy: Visualize pseudomembranes on the colon lining.
• Imaging: CT scans or abdominal X-rays to assess complications like toxic megacolon.

Treatment

• Discontinuation of Offending Antibiotics: Stopping the antibiotic that triggered the condition.
• Targeted Antibiotic Therapy: Medications such as vancomycin, fidaxomicin, or metronidazole to treat C. diff infection.
• Supportive Care: Hydration and electrolyte management.
• Fecal Microbiota Transplantation (FMT): Considered for recurrent cases to restore healthy gut flora.
• Surgery: In severe cases with complications like perforation or toxic megacolon, surgical intervention may be necessary.

Complications

• Dehydration: Due to excessive diarrhea.
• Toxic Megacolon: Severe colon distension leading to potential rupture.
• Perforation of the Colon: Can lead to peritonitis.
• Sepsis: A life-threatening response to infection.

Prevention

• Judicious Antibiotic Use: Only when necessary and with appropriate selection.
• Infection Control in Healthcare Settings: Hand hygiene, use of personal protective equipment, and environmental cleaning.
• Isolation Precautions: For infected individuals to prevent spread.