Journal
EUROPEAN JOURNAL OF CLINICAL MICROBIOLOGY & INFECTIOUS DISEASES
Volume 40, Issue 6, Pages 1137-1148Publisher
SPRINGER
DOI: 10.1007/s10096-020-04117-x
Keywords
Infective endocarditis; Enterococcus faecalis; Secular trend; Bacteremia; Epidemiology
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The study showed an increasing prevalence of E. faecalis as a causative agent of infective endocarditis (EFIE) over the past decade, along with clinical changes including older patient age, fewer surgical indications, and a slightly decreased in-hospital mortality rate. Additionally, there was an increase in the percentage of echocardiograms performed in patients with EFMB and EFIE diagnoses. Further investigations into the factors driving these clinical changes in EFIE are warranted.
The aim of the study was to analyze the epidemiological and clinical changes in EFIE. All definite IE episodes treated at a referral center between 2007 and 2018 were registered prospectively, and a trend test was used to study etiologies over time. EFIE cases were divided into three periods, and clinical differences between them were analyzed. All episodes of E. faecalis monomicrobial bacteremia (EFMB) between 2010 and 2018 and the percentage of echocardiograms performed were retrospectively collected. Six hundred forty-eight IE episodes were studied. We detected an increase in the percentage of EFIE (15% in 2007, 25.3% in 2018, P = 0.038), which became the most prevalent causative agent of IE during the last study period. One hundred and eight EFIE episodes were analyzed (2007-2010, n = 30; 2011-2014, n = 22; 2015-2018, n = 56). The patients in the last period were older (median 70.9 vs 66.5 vs 76.3 years, P = 0.015) and more frequently had an abdominal origin of EFIE (20% vs 13.6% vs 42.9%, P = 0.014), fewer indications for surgery (63.3% vs 54.6% vs 32.1%, P = 0.014), and non-significantly lower in-hospital mortality (30% vs 18.2% vs 12.5%, P = 0.139). There was an increase in the percentage of echocardiograms performed in patients with EFMB (30% in 2010, 51.2% in 2018, P = 0.014) and EFIE diagnoses (15% in 2010, 32.6% in 2018, P = 0.004). E. faecalis is an increasing cause of IE in our center, most likely due to an increase in the percentage of echocardiograms performed. The factors involved in clinical changes in EFIE should be thoroughly studied.
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