Abstract
The use of biological agents for the treatment of chronic inflammatory conditions such as inflammatory bowel diseases (IBD) has been on the rise.1,2 Current biological therapies include antitumor necrosis factor-α (anti-TNF-α), anti-interleukin-12/23, and anti-integrin agents. Before initiation of biological drugs, screening for Mycobacterium tuberculosis infection is required to avoid reactivation or worsening of disease after immunosuppression. It has been shown that anti-TNF-α treated patients have a 14-fold increased risk of tuberculosis (TB) infection/reactivation compared with healthy controls.3 The methods for screening for TB have evolved over time and vary from region to region.
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