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[Bacterial endocarditis: current bacteriological data]

F Vandenesch1, J Etienne

  • 1Laboratoire de microbiologie, hôpital Louis-Pradel, BP Lyon-Montchat.

Archives Des Maladies Du Coeur Et Des Vaisseaux
|December 1, 1993
PubMed
Summary
This summary is machine-generated.

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Infective endocarditis is primarily caused by streptococci and staphylococci, with Group D streptococci and Staphylococcus aureus being common culprits. The causative agents remain consistent despite various infection routes.

Area of Science:

  • Infectious Diseases
  • Microbiology
  • Cardiology

Context:

  • Infective endocarditis (IE) is a serious infection affecting heart valves and endocardium.
  • Understanding the microbial etiology of IE is crucial for effective treatment and prevention.
  • Despite advancements, the spectrum of causative pathogens in IE shows remarkable stability.

Purpose:

  • To analyze the current epidemiological landscape of causative agents in infective endocarditis.
  • To identify the most prevalent bacterial and fungal species responsible for IE.
  • To highlight specific patient populations at higher risk for certain types of IE.

Summary:

  • Viridans streptococci are the most frequent cause (35-45%), followed by Group D streptococci (approx. 20%), notably Streptococcus bovis and enterococci.

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  • Staphylococci, particularly Staphylococcus aureus, account for 17-30% of cases, often associated with prosthetic valves, catheters, or intravenous drug use.
  • Gram-negative bacilli (HACEK group), Q fever, Chlamydia, and fungal infections (Candida) are rare causes, with negative blood cultures occurring in about 10% of IE cases.

    • Impact:

    • This data reinforces the importance of targeting streptococci and staphylococci in IE diagnostics and empirical therapy.
    • It underscores the need for vigilance in specific high-risk groups, such as those with indwelling devices or intravenous drug use.
    • The persistent prevalence of certain pathogens highlights the ongoing challenge in preventing and managing infective endocarditis effectively.