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[Microbial spectrum and microbiological diagnosis of infectious endocarditis]
1Abteilung Medizinische Mikrobiologie, Klinikum der Universität Kiel.
Abstract:
Still streptococci play the most important role as causatives of infective endocarditis. As change in composition of patient groups has taken place gradually pathogens like Staphylococcus epidermidis, enterococci, gram-negative rods and Candida species become more and more important now. Providing high-level accuracy if applied according to current rules blood culture is yet the basis for endocarditis caused by popular bacterial pathogens. If infection due to Candida species is suspected additional measuring of antibody response may be helpful in supporting the tentative diagnosis. Rare pathogens like Rickettsiae and Mycoplasma sp. must be considered for differential diagnosis, as infections caused by these organisms are to be identified by serological methods in first line.
Insights
Infective endocarditis is increasingly caused by diverse pathogens beyond streptococci, including Staphylococcus epidermidis and Candida species. Diagnosis relies on blood cultures for bacteria and antibody response for fungi, with serology crucial for rare agents.
Area of Science:
- Infectious Diseases
- Microbiology
- Clinical Diagnostics
Context:
- Infective endocarditis (IE) etiology is evolving, with a shift in causative pathogens.
- Traditional focus on streptococci is expanding to include Staphylococcus epidermidis, enterococci, gram-negative rods, and Candida species.
- Changing patient demographics influence the spectrum of IE pathogens.
Purpose:
- To highlight the changing landscape of infective endocarditis pathogens.
- To emphasize diagnostic approaches for bacterial, fungal, and rare causative agents.
- To underscore the importance of accurate etiological diagnosis for effective treatment.
Summary:
- Streptococci remain significant, but Staphylococcus epidermidis, enterococci, gram-negative rods, and Candida species are increasingly implicated in infective endocarditis.
- Blood cultures are the cornerstone for diagnosing common bacterial endocarditis.
- Antibody response measurement aids in diagnosing Candida endocarditis, while serological methods are essential for rare pathogens like Rickettsiae and Mycoplasma.
Impact:
- Improved diagnostic strategies for infective endocarditis.
- Enhanced understanding of evolving microbial causes of endocarditis.
- Facilitation of timely and appropriate treatment through accurate pathogen identification.