Tysabri Antibodies, ELISA
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
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