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Παρασκευή 18 Ιανουαρίου 2019

Severe disseminated Nocardia infection associated with ustekinumab treatment for psoriasis

Abstract

Ustekinumab is one of the newer biologic agents on the market, and most clinical experience associated with this agent has been accumulated with the treatment of psoriasis. It exerts its effect through IL‐12/IL‐23p40 antagonism. This immune signaling pathway is associated with Mendelian Susceptibility to Mycobacterial Disease, a genetic condition predisposing to opportunistic infections with mycobacteria and other select organisms. Nonetheless, clinical trial safety data for this agent has suggested its safety, with very few case reports of severe opportunistic infections. It is sometimes considered to be associated with a lesser infectious risk compared to some other biologic agents such as tumor necrosis factor inhibitors. We report a 56‐year‐old patient presenting with an unusually severe disseminated Nocardia farcinica infection associated with ustekinumab treatment: sustained bacteremia, disseminated skin lesions, large renal abscess, septic renal vein thrombosis and pulmonary and cerebral lesions . To our knowledge, this is the first report of disseminated nocardiosis associated with this monoclonal antibody.

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