Lab Test

Echinococcus Antibody, IgG

Hydatid cyst(s)

Test Codes

Mayo: ECHNO, EPIC: LAB6011, Beaker: XECHN

Instructions

Acute and convalescent specimens must be labeled as such; parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute samples. Please mark sample plainly as "acute" or "convalescent."

Specimen Collection Criteria

Collect (preferred specimen): One Gold-top SST tube.
Also acceptable: One plain Red-top tube.

Physician Office/Draw Specimen Preparation

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells within two hours of collection. Transfer serum to a plastic transport tube and refrigerate (2-8°C or 36-46°F).

Preparation for Courier Transport

Transport: 0.5 mL serum, refrigerated (2-8°C or 36-46°F). (Minimum: 0.2 mL)

Rejection Criteria

  • Severely lipemic or hemolyzed specimens.
  • Specimens not collected and processed as indicated.

In-Lab Processing

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells within two hours of collection. Transfer serum to a plastic transport tube and refrigerate (2-8°C or 36-46°F).

Transport: 0.5 mL serum, refrigerated (2-8°C or 36-46°F). (Minimum: 0.2 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): unacceptable
Refrigerated (2-8°C or 36-46°F): 30 days
Frozen (-20°C/-4°F or below): 30 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Mayo Clinic Laboratories in Rochester, MN.

Performed

Tuesday, Thursday.
Results are available in 2-6 days.

Reference Range

By report.

Test Methodology

Enzyme Immunoassay (EIA).

Interpretation

Patients with collagen vascular diseases, hepatic cirrhosis, schistosomiasis, and other parasitic infections can produce false positive results. There is a strong cross-reaction between echinococcosis and cysticercosis positive sera.

Seroconversion between acute and convalescent sera is considered strong evidence for infection is a significant change on two appropriately timed specimens where both tests are done in the same laboratory at the same time.

Clinical Utility

This assay is used to support a diagnosis of Echinococcosis.

CPT Codes

86682
LOINC:  32171-1

Contacts

Last Updated

7/7/2021

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