Reference Range: |
0.000-0.890 IV
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Negative: No significant level of Echinococcus IgG antibody detected.
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0.900-1.109 IV
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Equivocal: Questionable presence of Echinococcus IgG antibody detected. Repeat testing in 10-14 days may be helpful.
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1.210 IV or greater
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Positive: Presence of IgG antibody to Echinococcus detected, suggesting of current or past infection.
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*IV = Index Value: Optical Density (OD) of the patient serum divided by the OD of the cut-off value.
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.
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