Trends in infective endocarditis

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Published Dec 20, 2017
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Vol. 95 No. 4 (2017): Issue Apr 2017

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Khadija Mzoughi
Ihsen Zairi
Samia Ben Hamida
Sofien Kamoun
Fethia Ben Moussa
Sana Fennira
Sondos Kraiem

Abstract

Introduction: Infectious endocarditis (IE) is a rare disease with a high mortality. In 2009, the European society of cardiology restricted antibiotic prophylaxis to a smaller number of cardiac conditions with very high risk for IE. Did these changes in the guidelines have an impact on the epidemiological and bacteriological profile of IE?
Aim: The main aim of our work was to study the evolution of the microbiological profile of IE from 1991 to 2016. We realized an analytic retrospective study comparing two groups: group 1 included patients admitted for a certain IE before September 2009 and group 2 those admitted after that date.
Results: Patients mean age was 46 ± 13 years and sex ratio was of 1.5. Forty percent of the patients were at high risk of IE. Blood cultures were positive in 19 cases. The most frequently isolated germ was Staphylococcus (10 patients). Serology was performed in six patients and was positive for Chlamydia Trachomatis in two cases. Forty-two patients had surgical treatment, 17 had a valve culture that was positive in 3 cases only. Clinical and paraclinic characteristics were comparable among the two groups. Negative blood cultures rates decreased from 72% to 68% between group 1 and 2 (p = 0.789). Staphylococcus positive blood cultures increased from 13% to 21% (p = 0.49). In contrast, Streptococcal positive blood cultures decreased from 11% to 5% in 2009 (p = 0.69).
Conclusion: Our data suggest that there has been no change in the bacteriological profile of IE after the reduction in antibiotic prophylaxis.

Keywords:

Infectious Endocarditis- Microbiology- Blood Culture-Portal of entry

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