Test Id : HEVG
Hepatitis E Virus IgG Antibody, Serum
Useful For
Suggests clinical disorders or settings where the test may be helpful
Diagnosis of past exposure to hepatitis E virus
Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
For information see Hepatitis E: Testing Algorithm for Diagnosis and Management.
Method Name
A short description of the method used to perform the test
Enzyme Immunoassay (EIA)
NY State Available
Indicates the status of NY State approval and if the test is orderable for NY State clients.
Reporting Name
Lists a shorter or abbreviated version of the Published Name for a test
Aliases
Lists additional common names for a test, as an aid in searching
Hepatitis E screen
Hepatitis E IgG antibody
Anti-hepatitis E IgG
HEV IgG antibody
Anti-HEV IgG
Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
For information see Hepatitis E: Testing Algorithm for Diagnosis and Management.
Specimen Type
Describes the specimen type validated for testing
Serum SST
Necessary Information
Date of collection is required.
Specimen Required
Defines the optimal specimen required to perform the test and the preferred volume to complete testing
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube: Serum gel
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL
Collection Instructions:
1. Centrifuge blood collection tube per collection tube manufacturer's instructions (eg, centrifuge within 2 hours of collection for BD Vacutainer tubes).
2. Aliquot serum into a plastic vial.
Special Instructions
Library of PDFs including pertinent information and forms related to the test
Forms
If not ordering electronically, complete, print, and send 1 of the following:
-Gastroenterology and Hepatology Test Request (T728)
-Infectious Disease Serology Test Request (T916)
-Microbiology Test Request (T244)
Specimen Minimum Volume
Defines the amount of sample necessary to provide a clinically relevant result as determined by the testing laboratory. The minimum volume is sufficient for one attempt at testing.
See Specimen Required
Reject Due To
Identifies specimen types and conditions that may cause the specimen to be rejected
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross icterus | Reject |
Specimen Stability Information
Provides a description of the temperatures required to transport a specimen to the performing laboratory, alternate acceptable temperatures are also included
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum SST | Frozen (preferred) | ||
| Refrigerated | 24 hours | ||
Useful For
Suggests clinical disorders or settings where the test may be helpful
Diagnosis of past exposure to hepatitis E virus
Testing Algorithm
Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
For information see Hepatitis E: Testing Algorithm for Diagnosis and Management.
Clinical Information
Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test
Hepatitis E virus (HEV) causes an acute, usually self-limited, infection. This small, nonenveloped RNA virus is transferred from an animal reservoir (eg, hogs) to humans via the fecal-oral route. HEV is endemic in Southeast and Central Asia, with several outbreaks observed in the Middle East, northern and western parts of Africa, and Mexico. In developed countries, HEV infection occurs mainly in persons who have traveled to disease-endemic areas. Transmission of HEV may also occur parenterally, and direct person-to-person transmission is rare. Clinically severe cases occur in young to middle-aged adults. Unusually high mortality (approximately 20%) occurs in patients infected during the third trimester of pregnancy. Although there is no carrier state associated with HEV, immunocompromised patients may have prolonged periods (eg, months) of viremia and virus shedding in the feces.
In immunocompetent patients, viremia and virus shedding in the feces occur in the pre-icteric phase, lasting up to 10 days into the clinical phase. After an incubation period ranging from 15 to 60 days, HEV-infected patients develop symptoms of hepatitis with appearance of anti-HEV IgM antibody in serum, followed by detectable anti-HEV IgG within a few days. Anti-HEV IgM may remain detectable up to 6 months after onset of symptoms, while anti-HEV IgG usually persists for many years after infection. Anti-HEV IgG is the serologic test of choice to determine past exposure to HEV.
Reference Values
Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.
Negative
Interpretation
Provides information to assist in interpretation of the test results
Positive results indicate past or resolved hepatitis E infection.
Negative results indicate absence of previous exposure to hepatitis E virus (HEV).
Borderline results may be seen in acute or recent hepatitis E infection with rising level of anti-HEV IgG or cross-reactivity with nonspecific antibodies (ie, false-positive results). Repeat testing of serum for anti-HEV IgG in 4 to 6 weeks is recommended to determine the definitive HEV infection status.
Cautions
Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances
A negative test result does not exclude the presence of recent hepatitis E infection (<2-month duration), especially in immunocompromised patients. Repeat testing for anti-hepatitis E virus (HEV) IgM and anti-HEV IgG in 1 to 2 months is necessary for diagnosis of recent hepatitis E.
Performance characteristics of this assay have not been established for serum specimens that are heat inactivated, icteric, lipemic, hemolyzed, or contain particulate matter.
Clinical Reference
Recommendations for in-depth reading of a clinical nature
1. Aggarwal R: Diagnosis of hepatitis E. Nat Rev Gastroenterol Hepatol. 2013;10(1):24-33
2. Schemmerer M, Rauh C, Jilg W, Wenzel JJ. Time course of hepatitis E-specific antibodies in adults. J Viral Hepat. 2017;24(1):75-79. doi:10.1111/jvh.12621
3. European Association for the Study of the Liver. EASL Clinical Practice Guidelines on hepatitis E virus infection. J Hepatol. 2018;68(6):1256-1271. doi:10.1016/j.jhep.2018.03.005
4. Kar P, Karna R. A Review of the Diagnosis and Management of Hepatitis E. Curr Treat Options Infect Dis. 2020;12(3):310-320. doi:10.1007/s40506-020-00235-4
Method Description
Describes how the test is performed and provides a method-specific reference
This is a qualitative, in vitro test for the detection and identification of IgG antibodies specifically against to hepatitis E virus (HEV) in human serum. This assay is a screening test based on the principle of an indirect sandwich enzyme-linked immunosorbent assay.
Highly purified recombinant HEV-ORF2 viral antigens (specific for HEV genotypes 1 and 3) are fixed to microplate wells. Diluted patient serum samples are incubated in the wells, in which antibodies bind specifically to the HEV recombinant antigens coating the surface of the wells. Unbound antibodies are then washed away. Anti-human immunoglobulin antibodies (IgG), which are coupled to horseradish peroxidase, are then added to the wells and incubated. Unbound conjugate antibodies are then washed away. Specifically, bound antibodies are detected by a peroxidase-catalyzed color reaction. Intensity of the color, as measured with a photometric analyzer, is proportionate to the quantity of bound HEV IgG antibodies present in the serum specimen.(Unpublished Mayo method)
PDF Report
Indicates whether the report includes an additional document with charts, images or other enriched information
Day(s) Performed
Outlines the days the test is performed. This field reflects the day that the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time before the test is performed. Some tests are listed as continuously performed, which means that assays are performed multiple times during the day.
Wednesday, Friday
Report Available
The interval of time (receipt of sample at Mayo Clinic Laboratories to results available) taking into account standard setup days and weekends. The first day is the time that it typically takes for a result to be available. The last day is the time it might take, accounting for any necessary repeated testing.
Specimen Retention Time
Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
Performing Laboratory Location
Indicates the location of the laboratory that performs the test
Fees :
Several factors determine the fee charged to perform a test. Contact your U.S. or International Regional Manager for information about establishing a fee schedule or to learn more about resources to optimize test selection.
- Authorized users can sign in to Test Prices for detailed fee information.
- Clients without access to Test Prices can contact Customer Service 24 hours a day, seven days a week.
- Prospective clients should contact their account representative. For assistance, contact Customer Service.
Test Classification
Provides information regarding the medical device classification for laboratory test kits and reagents. Tests may be classified as cleared or approved by the US Food and Drug Administration (FDA) and used per manufacturer instructions, or as products that do not undergo full FDA review and approval, and are then labeled as an Analyte Specific Reagent (ASR) product.
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.
CPT Code Information
Provides guidance in determining the appropriate Current Procedural Terminology (CPT) code(s) information for each test or profile. The listed CPT codes reflect Mayo Clinic Laboratories interpretation of CPT coding requirements. It is the responsibility of each laboratory to determine correct CPT codes to use for billing.
CPT codes are provided by the performing laboratory.
CPT codes are provided by the performing laboratory.
86790
LOINC® Information
Provides guidance in determining the Logical Observation Identifiers Names and Codes (LOINC) values for the order and results codes of this test. LOINC values are provided by the performing laboratory.
| Test Id | Test Order Name | Order LOINC Value |
|---|---|---|
| HEVG | HEV IgG Ab, S | 49693-5 |
| Result Id | Test Result Name |
Result LOINC Value
Applies only to results expressed in units of measure originally reported by the performing laboratory. These values do not apply to results that are converted to other units of measure.
|
|---|---|---|
| 86211 | HEV IgG Ab, S | 49693-5 |