Clostridioides difficile is a bacterium that causes an infection of the large intestine. Symptoms can range from diarrhea to life-threatening damage to the colon.
The bacterium is often referred to as C. difficile or C. diff.
Illness from C. difficile typically occurs after use of antibiotic medications. It most commonly affects older adults in hospitals or in long-term care facilities.
What are Toxin A and B?
The GI-MAP tests for the genes toxin A and toxin B, which are carried by C. difficile.
Clostridium difficile toxin A (TcdA) is a toxin generated by Clostridium difficile. It is similar to Clostridium difficile Toxin B. The toxins are the main virulence factors produced by the gram positive, anaerobic, Clostridium difficile bacteria.
How do the toxins function?
The toxins function by damaging the intestinal mucosa and cause the symptoms of C. difficile infection, including pseudomembranous colitis.
What are risk factors?
Risk factors for C. difficile infection include antibiotic treatment, which can disrupt normal intestinal microbiota and lead to colonization of C. difficile bacteria.
Epidemiology:
- 2–10% of population are carriers, most are asymptomatic
- Prolonged use of antibiotics may be causative factor
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