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  • Title: A contemporary 16-year review of Coxiella burnetii infective endocarditis in a tertiary cardiac center in Queensland, Australia.
    Author: Armstrong MR, McCarthy KL, Horvath RL.
    Journal: Infect Dis (Lond); 2018 Jul; 50(7):531-538. PubMed ID: 29516748.
    Abstract:
    BACKGROUND: Coxiella burnetii endocarditis can be difficult to diagnose leading to delays in treatment. This retrospective case series study was undertaken to understand the epidemiologic trends and clinical features of Q fever endocarditis in Southeast Queensland, Australia. METHODS: Clinical records of patients from a single center with coding diagnosis of C. burnetii, or serology consistent with chronic Q fever, were reviewed from 1999 to 2015. Data from patients with probable or confirmed Q fever endocarditis was abstracted. RESULTS: Thirteen patients had confirmed and 5 had probable Q fever endocarditis. Median age at diagnosis in confirmed cases was 60 years. In confirmed cases, 92% (12/13) of patients had an underlying valvular defect. Two patients in the confirmed cases had serology not consistent with a diagnosis of Q fever endocarditis. Eight patient records noted retrospective diagnosis of Q fever endocarditis after surgery. CONCLUSIONS: As pre-existing valve pathology is a major risk for developing endocarditis, prophylactic strategies such as targeted echocardiography and Q fever vaccination could be considered to reduce the incidence of Q fever endocarditis.
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