Which medications have the lowest risk of tuberculosis reactivation in patients with uncertain tuberculosis history and active rheumatologic disease?  

Conventional synthetic DMARDs used in RA are at lower risk for reactivation of latent TB. Steroids do confer some risk of reactivation. The highest risk is the class of biologic DMARDs used to treat RA and many rheumatic diseases with the exception of rituximab.

Among the biologics, Orencia is safer than TNF in such a situation.