AU/mL (arbitrary units per mL)
Interpretation of Adalimumab antibody levels
This assay measures TOTAL Adalimumab Antibody concentration.
Total Antibody concentration >/= 6 AU/mL is positive. The distribution for 600 positive results is as follows:
|Centile range||Total Adalimumab antibodies (AU/mL)|
|0 – 5th||6 – 11|
|6th – 25th||12 – 21|
|26th – 50th||22 – 57|
|51st – 75th||58 – 199|
The top of the measuring range is 200 AU/mL. This corresponds to the 76th Centile
For further interpretation please see: Anti TNF monitoring guidance
The ELISA immunoassay method used for adalimumab total anti-drug antibody measurement at Exeter Blood Sciences laboratory uses a streptavidin-biotin system in its design. If patients are taking large doses of Biotin (Vitamin B7), there is potential for interference in this assay with a possibility of lowered results when biotin concentration >477 nmol/L.
For further information on biotin interference please see: https://www.exeterlaboratory.com/biotin-alert-potential-assay-interference/
If you have any further enquiries please contact the Duty Biochemist by email: firstname.lastname@example.org
Can be added on to an existing request
We welcome referrals for Anti TNF monitoring. If you are a new requestor please complete the following form: New requestor form.
We now also have the option to use NPEx for referral requesting.
Further information about sample requirements for this test can be found here:Adalimumab and Anti-Adalimumab Antibodies – further informationSpecimen Labelling Procedure