TNF and rheumatoid arthritis: Tuberculosis screening before anti-TNFα therapy has been recommended by the US Centers for Disease Control and Prevention, the American Thoracic Society, and the British Thoracic Society,9 because anti-TNFα agents may increase of the risk of tuberculosis.10 It has been reported that specific diseases, including IBD and rheumatoid arthritis, contribute to the increased incidence of tuberculosis.