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Test Code LABCYSTS Cysticercosis Antibody, IgG

Important Note

Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens.

Additional Codes

Test Name in EPIC

 EPIC Test Code  Mnemonic ARUP Test ID

Cysticercosis Ab, IgG

 LABCYSTS CYST SER 0055284

 

Useful For/Utility

Use to detect presence of IgG antibodies to T. solium in serum if clinical suspicion of cysticercosis exists.

Methodology

Semi-Quantitative Enzyme-Linked Immunosorbent Assay

Clinical Information

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.

Patients with collagen vascular diseases, hepatic cirrhosis, schistosomiasis, and other parasitic infections can produce false-positive results. There is a strong cross-reaction between cysticercosis and echinococcosis positive sera. Confirmation of positive ELISA results by the cysticercosis antibody, IgG by Western blot is recommended.

Specimen Requirements

1 mL serum SST (0.1 mL min)

 Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Mark specimens plainly as "acute" or "convalescent."

Specimen Transport Temperature

Ship refrigerated

Day(s) Test Set Up

Saturdays

Reported 1-8 days

Performing Laboratory

ARUP

Test Classification and CPT Coding

LOINC 25389-8

CPT 86682

Reference Values

<9 U Negative - No significant level of cysticercosis IgG antibody detected.
9-11 U Equivocal - Recommend repeat testing in 2-4 weeks with fresh sample
>11 U Positive - IgG antibodies to cysticercosis detected, which may suggest current or past infection.