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Test Code HPSAG Helicobacter pylori Antigen, Stool

Infectious

Specimen and Container/Tube

Specimen Type: Stool (formed, semi-solid, liquid)

Preferred Specimen: Sterile, sealable, screw-cap container

Volume

Minimum Volume: 2 grams

Specimen Stability

Storage Temperature

Stability

Room temperature

(20 - 25°C)

not acceptable

Refrigerated

(2 - 8°C)

 72 hours

Frozen

(-20°C)

not acceptable

Collection Instructions

Specimen Collection: If collected in bedpan, must not be contaminated with urine, residual soap, or disinfectant.


Specimen Transport: Immediate

Specimen Handling and Transport Instructions

UCMC Onsite Instructions: Collect specimen per standard collection procedure and send to laboratory immediately. 

 

UCMC Offsite and UC MedLab Outreach Instructions: Collect specimen per standard collection procedure and send to laboratory immediately. If transport is delayed, refrigerate specimens prior to transport.

Rejection Criteria

  • Common specimen rejected situations include: incorrect specimen type, insufficient volume, incorrect collection container, missing or incomplete specimen identifiers, incorrect specimen transport, or specimens outside stability limits. 

Reference Values

 

Test

Age

Sex

Reference Range
H. pylori antigen

All

All

Not Detected

Turnaround Time

Turnaround times are relative to the time the specimen is received in the test laboratory. 

STAT Turnaround Time: not available

Routine Turnaround Time: 24 hours

Testing Schedule: Monday - Sunday

Clinical Indications

  • Aid in the diagnosis of H. pylori infection and to demonstrate loss of H. pylori stool antigen following treatment.
  • Antimicrobials, proton pump inhibitors and bismuth preparations are known to suppress H. pylori, and ingestion of these prior to H. pylori testing (culture, histology, rapid urease, UBT, antigen) may cause false-negative results. If a patient has ingested these compounds within two weeks prior to performing the ImmunoCard STAT! HpSA test, a false-negative result may occur.

CPT Codes

87338

LOINC Codes

30087338

Methodology

Rapid lateral flow immunoassay

Synonyms/Keyword Search

H. pylori, H pylori, Helicobacter pylori Stool, PYLORI ANTIGEN

Last Review Date

10/10/2025