ARUP's Laboratory Test Directory

Saccharomyces cerevisiae Antibodies, IgG & IgA : 0050564

Mnemonic: SC PAN

Methodology: Enzyme-Linked Immunosorbent Assay
Performed: Sun, Tue, Thu
Reported: 1-4 days
Specimen Required: Collect:  One 4 mL serum separator tube.

Transport:  1 mL serum at 2-8°C. (Min: 0.5 mL)  Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport:  0.25 mL serum at 2-8°C.

Remarks:  Separate serum from cells ASAP.

Unacceptable Conditions:  Severely lipemic, contaminated, heat-inactivated, or hemolyzed specimens.

Stability:  After separation from cells: Ambient: 2 days; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)
Reference Interval:
 
Test Number Components Reference Interval
 Saccharomyces cerevisiae Antibody, IgA £ 20 Units: No Antibody Detected
21-24 Units: Equivocal
³ 25 Units: Positive
 Saccharomyces cerevisiae Antibody, IgG  £ 20 Units: No Antibody Detected
21-24 Units: Equivocal
³ 25 Units: Positive
 

Interpretive Data: Saccharomyces cerevisiae IgG antibodies are found in 80% of Crohn disease (CD) patients, but only 20% of ulcerative colitis (UC) patients.  Saccharomyces cerevisiae IgA antibodies are found in 35% of CD patients but less than 1% in UC patients.  Detection of both Saccharomyces IgG and IgA antibodies in the same serum specimen is highly specific for CD.
Note: This test may be a useful tool for distinguishing ulcerative colitis (UC) from Crohn disease (CD) in patients with suspected inflammatory bowel disease.
CPT Code(s): 86671 x2
 
 

 

 

 
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