Ordering Recommendation

Adjunct to other diagnostic tests (eg, imaging) for echinococcosis. Patient's travel history is necessary to aid in test interpretation.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Serum separator tube (SST) or plain red.

Specimen Preparation

Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP standard transport tube. (Min: 0.15 mL) Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of acute specimens. Mark specimens plainly as acute or convalescent.

Storage/Transport Temperature

Preferred transport temp: Refrigerated. Also acceptable: Frozen

Unacceptable Conditions

Contaminated, heat-inactivated, grossly hemolyzed, or severely lipemic specimens.


After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 month (avoid repeated freeze/thaw cycles)


Semi-Quantitative Enzyme-Linked Immunosorbent Assay (ELISA)


Mon, Thu


1-5 days

Reference Interval

Test Number
Reference Interval
  Echinococcus Antibody IgG 8 U or less

Interpretive Data

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 of recent infection. The best 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.

Echinococcus Antibody IgG 0-8 U........................Negative: No significant level of Echinococcus IgG antibodies detected.
9-11 U......................Equivocal: Recommend repeat testing in 2-4 weeks with fresh sample.
12 U or greater.........Positive: IgG antibodies to Echinococcus detected, indicating current or past infection.

Compliance Category



Hotline History


CPT Codes



Component Test Code* Component Chart Name LOINC
2007221 Echinococcus Antibody IgG 9656-0
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.


  • Echinococcosis
  • Hydatic disease
  • Hydatiosis
  • Tapeworm
Echinococcus Antibody, IgG