All tests
Blood tests
TB and Hepatitis Screening
Tests done before starting biologics or JAK inhibitors.
Video lesson
Why it’s ordered
To find latent infections that immune-suppressing medicines could reactivate.
Understanding results
A positive TB blood test (QuantiFERON or T-SPOT) usually means a short preventive antibiotic course before starting. Hepatitis B tests decide whether antiviral protection is needed.
Good to know
Repeat TB testing is often done yearly if you have ongoing exposure risk.
At a glance
Type
Blood tests
Reviewed by Farhan Tahir, MD, FACR
Questions about your own care?
Book an in-person or telehealth consultation with Dr. Tahir.
For education only. Don’t start, stop or change a medicine without talking to your care team.