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Updated: Jul 16, 2026

Assessing Bacterial Invasion of Cardiac Cells in Culture and Heart Colonization in Infected Mice Using Listeria monocytogenes
Published on: May 27, 2015
[The heart in cases of viral, bacterial and parasitic infections]
B Maisch1, P Alter, K Karatolius
1Klinik für Innere Medizin, Schwerpunkt Kardiologie, Universitätsklinikum Giessen und Marburg, Baldingerstr. 1, 35033 Marburg, Deutschland. Bernhard.Maisch@med.uni-marburg.de
Insights
Viral, bacterial, and parasitic infections can directly target the heart (myocarditis) or cause secondary damage. Understanding pathogen specificity is key for diagnosing and treating these inflammatory heart conditions.
Area of Science:
- Cardiology
- Infectious Diseases
- Immunology
Context:
- The heart can be affected by infections (primary myocarditis) or immune responses (secondary myocarditis).
- Organ specificity of pathogens influences the type of cardiac inflammation observed.
- Bacterial infections often target endothelial surfaces, leading to endocarditis.
Purpose:
- To differentiate between primary and secondary inflammatory cardiomyopathy.
- To discuss the organ specificity of various infective agents affecting the heart.
- To outline diagnostic and treatment strategies for infectious cardiac conditions.
Summary:
- Myocarditis can arise from direct infection or secondary immune-mediated damage.
- Viral, toxic, and autoimmune processes primarily affect the myocardium and pericardium.
- Bacterial infections commonly cause endocarditis, affecting endothelial surfaces.
Impact:
- Improved understanding of cardiac inflammation mechanisms.
- Guidance on accurate diagnosis and targeted treatment of myocarditis.
- Potential for better patient outcomes in inflammatory cardiomyopathy cases.
Abstract:
The heart can be the primary target for a viral, bacterial or parasitic infection (primary myocarditis/inflammatory cardiomyopathy). It can also participate in the "collateral damage" due to toxins, chemo- and cytokines, autoreactive antibodies or the native and acquired immune response through T- and B-cells, monocytes and macrophages (secondary myocarditis/inflammatory cardiomyopathy), when it is not the dominant organ of the disease. Infective agents show remarkable organ specificity: viral infections, toxic and autoreactive processes affect primarily the myocardium and the pericardium, whereas bacterial infections prefer endothelial surfaces and cause endocarditis and, less frequently, pericarditis. They are even discussed as part of the inflammatory process involved in coronary artery disease. Infective agents and their adequate diagnosis and treatment are discussed for these clinical entities according to current guidelines and clinical pathways.
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