Serious bacterial infections in patients with rheumatoid arthritis under anti-TNF-alpha therapy

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Abstract
Objective. With rising numbers of anti‐tumour necrosis factor α (TNF‐α) treatments for rheumatoid arthritis (RA), Crohn's disease and other conditions, physicians unaware of potential pitfalls are increasingly likely to encounter associated severe infections. Our purpose was to assess the incidence and nature of severe infections in our RA patients under anti‐TNF‐α therapy. Methods. We reviewed patient charts and records of the Infectious Disease Unit for serious infections in patients with RA in the 2 yr preceding anti‐TNF‐α therapy and during therapy. Results. Serious infections affected 18.3% of patients treated with infliximab or etanercept. The incidence was 0.181 per anti‐TNF‐α treatment year vs 0.008 in the 2 yr preceding anti‐TNF‐α therapy. In several cases, only a few signs or symptoms indicated the severity of developing infections, including sepsis. Conclusions. A high level of suspicion of infection is necessary in patients under anti‐TNF‐α therapy. We suggest additional strategies for the prevention, rapid identification and pre‐emptive therapy of such infections.

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