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Test ID: FFTYS    
Tysabri Antibodies, ELISA

Available on the App Store

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

Reference Range:  Negative


Interpretive Criteria:

                       Negative:  Antibodies not detected

                       Positive:   Antibodies detected


Patients being treated with Tysabri (Natalizumab) may develop Tysabri-specific antibodies that may block the therapeutic effect of the treatment. This assay detects antibodies that bind to Tysabri in vitro; a positive result should not be interpreted as definitive evidence of in vivo blocking activity.


Test Performed By:  Focus Diagnostics, Inc.

                              5785 Corporate Avenue

                              Cypress, CA  90630-4750