Objective: The present article aims to provide a systematic review of the influence of antitumor necrosis factor (TNF) on infection rates in patients with rheumatoid arthritis (RA).
Method: Medline was searched to obtain quality control information on infection rates in RA patients treated with anti-TNF.
Results: A high proportion of RA patients are now established users of anti-TNF agents. Data from national registries in European countries of patients with RA treated with anti-TNF suggest that biological therapies are closely linked to sepsis. Although previous studies reported a higher risk of infections, there are now emerging data with longer duration of follow-up that suggested an adjusted hazard risk of 1.2. Elderly patients and those with longstanding disease may have a higher rate of serious infections compared to their counterparts who were younger with early disease. There are now emerging data to suggest that anti-TNF therapy is associated with the development of neutropenia shortly after the commencement of treatment. The biologic registries found that RA patients treated with monoclonal antibodies are at increased risk of tuberculosis (TB) compared to those on TNF receptor blockers. This risk of infection needs to be weighed against the established benefits of TNF blockers.
Conclusion: Current evidence suggests that anti-TNF treatment in RA is closely linked to infection. Patients need to be aware of the risk of infection together with the established benefits of TNF blockers in order to give informed consent for treatment.
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