ASCA IgG

What is the ASCA IgG serum test used for?

The ASCA (Anti-Saccharomyces cerevisiae Antibodies) IgG test is used to support the diagnosis of Crohn’s disease, a type of inflammatory bowel disease (IBD). The presence of ASCA antibodies, particularly IgG, can help differentiate Crohn’s disease from ulcerative colitis, another form of IBD.

How does the test work?

This test detects antibodies in the blood that target components of the yeast Saccharomyces cerevisiae. Elevated levels of these antibodies are commonly seen in individuals with Crohn’s disease, indicating an immune response to yeast antigens.

When should this test be done?

 Your doctor may recommend this test if you have gastrointestinal symptoms like chronic diarrhea, abdominal pain, weight loss, or bloody stools, and there is suspicion of IBD. It can be especially helpful when endoscopic findings are inconclusive.

Do I need to prepare before taking this test?

No specific preparation is needed for this blood test. You can eat and drink as usual unless otherwise instructed by your physician.

How long does it take to get the results?

The results are typically available within 3–5 working days. Your healthcare provider will interpret the findings alongside your clinical presentation and other investigations.