HELICOBACTER PYLORI ANTIGEN, STOOL

Mnemonic

HPAG

Synonym

H. pylori stool antigen - Pylori antigen

Includes

Screening for the presence of Helicobacter pylori antigen

Specimen Collection Requirements

Patient Preparation

False negative results may occur on patients receiving antimicrobials, proton pump inhibitors, and bismuth preparations. If a negative result is obtained on a patient receiving these compounds, the test should be repeated on a new specimen obtained two weeks after discontinued treatment. Watery stools composed mainly of fluid with little or no solid matter may give false negative results.

Collect

Random Stool in leak-proof container. Avoid urine and toilet water in specimens which may cause a dilution factor.

Supply Item Number - 370167

View Stool Collection Guide

 

Handling

Stool must not be in any transport media or preservative. Do not overfill or contaminate the outside of the container.

Preferred Volume

5.0 gm or 5.0 mL

Minimum Volume

1.0 gm or 1.0 mL

Transport

If delay >2 hours, refrigerate for up to 72 hours. If testing cannot be performed with 72 hours, freeze specimen immediately upon receipt and store at -20 to -80°C. Frozen specimens may be thawed twice.

Rejection Criteria

Stool beyond stability or in preservative or transport media

Stability

Ambient: 2 hours; Refrigerated: 3 days; Frozen: 1 month

Testing Information

Performed

Mon-Fri, once on weekend

Reported

24-48 Hours

Method

Enzyme Immunoassay

Reference Values

Reference Values

Negative

CPT Codes

87338

Last Updated: Thursday, January 5, 2017 03:42:15 AM