ARUP's Laboratory Test Directory
| 0050995: Helicobacter pylori Antibody, IgA |
| Test Mnemonic: A PYLORI | |
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Methodology: Enzyme Immunoassay
Performed: Sun-Sat Reported: Within 24 hours |
| Specimen Required: | |
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Collect: One 4 mL SST, 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) |
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| Reference Interval: |
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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: | |
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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.
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| CPT Code(s): | |
| 86677 |