ARUP's Laboratory Test Directory

Helicobacter pylori Antibody, IgA : 0050995

Mnemonic: A PYLORI

Methodology: Enzyme Immunoassay
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect:  One 4 mL serum separator tube, lavender (EDTA), pink (K2EDTA), or green (sodium or lithium heparin).

Transport:  0.5 mL serum or plasma at 2-8°C. (Min: 0.3 mL)  Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport:  0.1 mL serum or plasma at 2-8°C.

Remarks:  Separate serum or plasma 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:
1.7 EV or less: Negative - No significant level of IgA antibody to H. pylori detected.
1.8-2.2 EV: Equivocal - Repeat testing in 10-14 days may be helpful.
2.3 EV or greater: Positive - IgA antibody to H. pylori detected, suggestive of active infection.
Interpretive Data: Helicobacter pylori IgG and IgA antibody seroconversion occur together after 60 days. Samples which have a high titer of both IgG and IgA antibodies to H. pylori in symptomatic individuals may be considered to represent an active infection. However, a positive H. pylori IgA result can only suggest active infection and should be confirmed by bacterial isolation or other diagnostic testing.
CPT Code(s): 86677
 
 

 

 

 
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