ARUP's Laboratory Test Directory

0050564: Saccharomyces cerevisiae Antibodies, IgG & IgA

Test Mnemonic: SC PAN
Methodology: Enzyme-Linked Immunosorbent Assay

Performed: Sun, Tue, Thu

Reported: 1-4 days

Specimen Required:  
Collect: One 4 mL SST.

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
0050563Saccharomyces cerevisiae Antibody, IgA £ 20 Units: No Antibody Detected
21-24 Units: Equivocal
³ 25 Units: Positive
0050562Saccharomyces 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