Adjunct to other diagnostic tests (eg, imaging) for echinococcosis. Patient's travel history is necessary to aid in test interpretation.
Semi-Quantitative Enzyme-Linked Immunosorbent Assay
Serum separator tube (SST).
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.
Contaminated or severely lipemic specimens.
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)
|0.0-0.8 IV||Negative - No significant level of Echinococcus IgG antibody detected.|
|0.9-1.1 IV||Equivocal - Questionable presence of Echinococcus IgG antibody detected. Repeat testing in 10-14 days may be helpful.|
|1.2 IV or greater||Positive - Presence of IgG antibody to Echinococcus detected, suggestive of current or past infection.|
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.
|Component Test Code*||Component Chart Name||LOINC|
|2007221||Echinococcus Antibody IgG||9656-0|
- Echinococcus IgG Antibody
- Hydatid Disease
- IgG Ab
- Tapeworm IgG Ab