ARUP's Laboratory Test Directory
| 0051698: Mycobacterium tuberculosis Antibody, IgG by ELISA |
| Test Mnemonic: TB IGG | |
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Methodology: Enzyme-Linked Immunosorbent Assay
Performed: Thu Reported: 1-8 days |
| Specimen Required: | |
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Collect: One 4 mL SST
Transport: 0.5 mL serum at 2-8°C. (Min: 0.2 mL) Submit specimen in an ARUP Standard Transport Tube. Pediatric Collection/Transport: 0.1 mL serum at 2-8°C. Remarks: Allow specimen to clot completely at room temperature. Separate serum from cells ASAP. Acute and convalescent specimens must be labeled as such; parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Please mark specimen plainly as "acute" or "convalescent." Unacceptable Conditions: Contaminated, hemolyzed, or heat-inactivated specimens. Stability: After separation from cells: Ambient: 2 days; Refrigerated: 2 weeks; Frozen: 1 year |
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| Reference Interval: |
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0.424 OD or less: Negative - No significant level of detectable IgG antibody to Mycobacterium tuberculosis. 0.425-0.500 OD: Equivocal - Repeat testing in 10-14 days may be helpful. 0.501 OD or greater: Positive - IgG antibody to Mycobacterium tuberculosis detected, which may indicate acute or active infection. |
| Interpretive Data: | |
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Please refer to Statement D in the Compliance Statements section in the front of this Laboratory Test Directory.
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| CPT Code(s): | |
| 86609 |