Case report
Jarisch-Herxheimer reaction complicating the treatment of chronic Q fever endocarditis: elevated TNFα and IL-6 serum levels

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Jarisch-Herxheimer reaction (J-HR) is an acute febrile reaction which may complicate the initiation of an effective treatment against infections due to intracellular micro-organisms. We report a case of J-HR complicating treatment of chronic Q fever endocarditis with demonstration of elevated serum cytokine concentrations.

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