Reference Interval:
0.8 IV or less: Negative - No significant level of Treponema pallidum IgG antibody detected.
0.9-1.1 IV: Equivocal - Questionable presence of Treponema pallidum IgG antibody detected. Repeat testing in 10-14 days may be helpful.
1.2 IV or greater: Positive - Presence of IgG antibody to Treponema pallidum detected, suggestive of current or past infection.
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| Interpretive Data: |
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 performed in the same laboratory at the same time. The Treponema pallidum Antibody (FTA-ABS), Serum, IgG by IFA (0050477) is recommended for follow-up of reactive nontreponemal tests for syphilis, and as a single test in patients suspected of late syphilis. For CSF specimens, the Treponema pallidum (VDRL) Cerebrospinal Fluid with Reflex to Titer (0050206) test is recommended.
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| CPT Code(s): |
86780
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Cross References: |
Syphilis Antibody, IgG by ELISA |
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