Prevalence and management of tuberculosis infection in Apulian rheumatologic patients treated with biologics: An observational cohort 10‐year study from the <scp>BIOPURE</scp> registry

The objective of this study was to assess the 10-year prevalence of latent tuberculosis infection (LTBI) among Apulian patients with rheumatic diseases (RDs). Secondary endpoint was to record new cases of active TB disease and LTBI among patients treated with biologic disease-modifying antirheumatic drugs (bDMARDs).We analysed the results from the patients included in the BIOPURE registry from 2009 to 2018, who underwent QuantiFERON-TB Gold In-tube (QFT-GIT) test as screening before biologic treatment. Demographic and clinical data were recorded at the time of the first QFT-GIT test. Administration of preventive therapy and bDMARD treatments were recorded for patients with positive QFT-GIT test. All new tuberculosis infections were recorded during the follow-up.The final study population included 3028 patients (855 Rheumatoid Arthritis, 1001 Psoriatic Arthritis, 833 spondyloarthritis, 130 connective tissue diseases, 33 systemic vasculitis, and 176 other inflammatory rheumatic conditions), more frequently female (67.2%), with a mean age of 52 &#177; 18 years. Patients with QFT-GIT positive test were elderly, predominantly male with higher prevalence of diabetes as comorbidity. The 10-year prevalence of LTBI was 10.8%. Of note, no cases of TB reactivation were recorded in patients who completed preventive therapy treatment. Three-thousand sixteen patients were followed overtime (42.6&#177;30 months), and 5 (0.2%) developed active TB which corresponds to 0.47 cases per 1000 person-years.In the 10-year observation, the use of biologic therapy seems to be safe in rheumatologic patients with positive QFT-GIT test treated according to current recommendations. Nevertheless, cases of primary TB disease did occur during treatment with biologics.