Abstract
Biologic therapies have revolutionised the treatment of immune-mediated diseases including inflammatory bowel disease [IBD] and rheumatological disorders. However, biologic treatments are associated with an increased risk of reactivation of latent tuberculosis. Data from regular monitoring for latent tuberculosis infection [LTBI] during biologic treatment are lacking. Consecutive patients eligible for biologic therapies were screened for LTBI and prospectively followed up for 3 years. Incidence and risk factors of latent tuberculosis tests conversion (interferon gamma release assays [IGRA], tuberculin skin tests [TST], and chest radiography [CXR]) with clinical outcomes were studied. A total of 108 patients [83 IBD; 25 rheumatological disorders] were included. At baseline, 18/108 [16.7%] patients [five IBD; 13 rheumatological disorders] were tested positive for LTBI. Of these, 14/18 [77.8%] patients received isoniazid monotherapy for 9 months. Of the remainder, 17/90 [18.9%] patients had LTBI test conversion while on biologic therapies and of these 14/17 [82.4%] received isoniazid monotherapy for 9 months. Age, sex, smoking status, alcohol use, travel history, disease type, and immunosuppressive therapy were not associated with...Continue Reading
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