Sample results
Pouchitis is inflammation of the ileal pouch, an artificial rectum surgically created for patients with ulcerative colitis who have undergone colectomy. It is caused by bacterial overgrowth, immune dysfunction, and changes in the pouch microbiome that trigger inflammatory responses. The Saccharomyces cerevisiae Antibodies (ASCA) IgG test is the most important blood test for assessing pouchitis risk and monitoring immune patterns in pouch patients.
Pouchitis is caused by bacterial overgrowth, immune system dysfunction, and alterations in the pouch microbiome following ileal pouch-anal anastomosis (IPAA) surgery. The artificial pouch creates an environment where bacteria can accumulate and trigger inflammation, particularly in patients who previously had ulcerative colitis. Changes in bile acid metabolism, reduced blood flow to the pouch, and genetic predisposition also contribute to the inflammatory response that characterizes pouchitis.
The Saccharomyces cerevisiae Antibodies (ASCA) IgG test is the most important blood test for pouchitis because it detects antibodies that indicate an increased risk of developing pouch inflammation. Higher ASCA IgG levels have been strongly associated with pouchitis susceptibility in patients with ileal pouches, helping doctors identify who needs closer monitoring. While pouchitis is ultimately diagnosed through endoscopy and clinical symptoms, the ASCA test provides valuable predictive information about your immune patterns and inflammation risk, allowing for earlier intervention and preventive treatment strategies.
You should get tested if you have an ileal pouch and experience increased bowel movements, urgency, abdominal cramping, or bleeding. Testing is especially important if you notice a sudden change in your pouch function, persistent pelvic discomfort, or fever and fatigue that might indicate inflammation. Consider ASCA antibody testing soon after pouch surgery to establish your baseline risk profile, or anytime you develop new symptoms that could signal pouch inflammation requiring medical attention.
What this means
Your ASCA IgG test came back negative, meaning no antibodies to Saccharomyces cerevisiae were detected in your blood. This result makes Crohn's disease less likely, though it doesn't completely rule it out since about 25% of Crohn's patients test negative. If you continue experiencing digestive symptoms, additional testing may be needed.
Recommended actions
Keep a detailed food and symptom diary to identify potential triggers
Focus on an anti-inflammatory diet with plenty of fiber, fruits, and vegetables
Manage stress through mindfulness, exercise, or relaxation techniques
Discuss other diagnostic options with your gastroenterologist if symptoms persist
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Sample results
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