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HelpTest Code FEHAG Entamoeba histolytica Antigen, EIA
Specimen Required
Preferred Specimen Type: Unpreserved stool
Supplies: Sterile stool container
Container/Tube: Sterile stool container
Specimen Volume: 2 g
Specimen Stability Information: Frozen
Collection Instructions: Collect 2 grams of fresh unpreserved stool in sterile container. Send specimen frozen.
NOTE: Separate specimens must be submitted when multiple tests are ordered.
Secondary ID
75350Method Name
Enzyme Immunoassay (EIA)
Reporting Name
Entamoeba histolytica AntigenSpecimen Type
FecalSpecimen Minimum Volume
1 gram
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Fecal | Frozen (preferred) | 7 days | |
| Refrigerated | 48 hours |
Reject Due To
| Other | Stool in preservative; Carey-Blair Transport Media, rectal swabs; diaper specimens; liver abscess |
Clinical Information
Entamoeba histolytica are intestinal parasites that infect a half billion people worldwide annually. Of those infected, most are infected with the non-pathogenic E. dispar, which has not been associated with disease. It is estimated that approximately 10 % of the half billion people infected each year are infected with the pathogenic E. histolytica. These individuals become symptomatic and develop colitis and liver abscesses.
Limitations: Extraintestinal amebiasis is frequently found without trophozoites or cysts in stool: patients may have a negative stool antigen result.
Reference Values
Entamoeba histolytica Antigen: Not Detected
The Entamoeba histolytica Antigen EIA test detects only the antigen of the pathogenic E. histolytica; the non-pathogenic E. dispar is not detected.
CPT Code Information
87337
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FEHAG | Entamoeba histolytica Antigen | 29905-7 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| Z5167 | Entamoeba histolytica Antigen | 29905-7 |