Abstract
Objective: This study aimed to evaluate hepatitis B virus (HBV) serology and the frequency of HBV reactivation (HBVr) in rheumatology patients with resolved hepatitis B infection (HBsAg-/Anti-HBc+) who were treated with biologic or targeted synthetic disease-modifying anti-rheumatic drugs (b/tsDMARDs). Materials and Methods: Data from rheumatology patients treated with b/tsDMARDs were retrospectively reviewed from the electronic records. The demographic data, the anti-rheumatic drugs used, and the hepatitis serologies (HBsAg, anti-HBc IgG, anti-HBs, and anti-HCV) of the patients were analyzed. Results: The study included a total of 316 patients, of whom 217 (68.7%) were diagnosed with ankylosing spondylitis, 74 (23.4%) with rheumatoid arthritis, and 25 (7.9%) with psoriatic arthritis. Evaluation of the patients' viral serologies revealed that four (1.2%) were HBsAg+, and 18 (5.7%) were HBsAg-/anti-HBc+. Anti-HCV positivity was observed in one (0.3%) patient. All serologies were negative in 153 (48.4%) patients. No HBVr was detected during the follow-up of the patients. Conclusion: The rate of resolved hepatitis B infection is relatively high in patients under rheumatologic follow-up. However, the use of biologics in these patients poses a low risk of HBVr.
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