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Related Concept Videos

Endocarditis I: Introduction01:25

Endocarditis I: Introduction

45
Introduction:Endocarditis is the infection of the endocardium, the inner lining of the heart and its valves. When the heart muscle is involved, the condition is termed myocarditis, while an infection of the outer lining is called pericarditis. Infective endocarditis (IE) primarily affects the endocardium, where pathogens adhere to the valves or lining, forming vegetation that can lead to severe complications. Infective endocarditis occurs when microorganisms, usually bacteria from other body...
45
Endocarditis II: Clinical Features of Infective Endocarditis01:25

Endocarditis II: Clinical Features of Infective Endocarditis

33
Endocarditis can present various clinical features depending on the causative organism and the patient's underlying health conditions. Initially, the clinical features of infective endocarditis develop gradually, presenting with nonspecific symptoms that can be easily mistaken for other illnesses.General SymptomsEarly symptoms of infective endocarditis are fever, chills, weakness, malaise, fatigue, and weight loss. These symptoms reflect the systemic nature of the infection and the body's...
33
Endocarditis III: Medical Management01:18

Endocarditis III: Medical Management

31
Infective endocarditis management involves a multifaceted approach encompassing infection prevention, lifestyle modifications, pharmacological therapy, and surgical management.Infection Prevention:Hand Hygiene: Thorough handwashing is crucial to prevent the spread of infection. Hand hygiene should be performed regularly, especially before and after using the restroom.Oral Hygiene: Good oral hygiene is essential. It includes brushing teeth immediately after waking up and before bed, flossing...
31
Endocarditis IV: Nursing Management01:29

Endocarditis IV: Nursing Management

53
Infective endocarditis (IE) is a chronic infection of the heart's endocardium, primarily affecting the heart valves. A detailed nursing assessment for a patient with IE involves collecting subjective and objective data to ensure an accurate diagnosis and timely intervention.Subjective DataThe nurse gathers information about the patient's symptoms and complaints during the subjective assessment. Patients with infective endocarditis often report non-specific symptoms that can mimic other...
53

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Related Experiment Video

Updated: Sep 26, 2025

Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus MRSA in Rat
07:46

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Dynamics of a Staphylococcus aureus infective endocarditis simulation model.

Franziska A Schwartz1, Luna Nielsen1,2, Jessica Struve Andersen1,2

  • 1Department of Clinical Microbiology, Rigshospitalet, Copenhagen, Denmark.

APMIS : Acta Pathologica, Microbiologica, Et Immunologica Scandinavica
|April 23, 2022
PubMed
Summary

Infective endocarditis biofilms form rapidly within 6 hours on a novel simulated vegetation model. Early antibiotic intervention significantly improves treatment efficacy compared to later treatment of mature biofilms.

Keywords:
Biofilmantibiotic tolerancehistopathologyhost responseinfective endocarditisorganoid

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Area of Science:

  • Cardiovascular Medicine
  • Microbiology
  • Infectious Diseases

Background:

  • Infective endocarditis (IE) is a severe heart lining infection originating from endocardial lesions.
  • Sterile vegetations form during healing and can be colonized by bacteria during bacteremia, leading to IE.
  • Previous work established an in vitro IE model with stable bacterial colonization and biofilm formation.

Purpose of the Study:

  • To characterize the timeline of biofilm formation in the in vitro IE model.
  • To assess the impact of biofilm maturation on antibiotic tolerance.
  • To evaluate the efficacy of early versus delayed antibiotic treatment.

Main Methods:

  • Utilized a novel in vitro IE vegetation (IEV) model created from whole venous blood.
  • Inoculated the IEV with Staphylococcus aureus reference strain and clinical IE isolates.
  • Monitored biofilm development microscopically over time.
  • Compared antibiotic efficacy when treatment was initiated immediately versus after biofilm maturation.

Main Results:

  • Biofilms formed on the IEV within 6 hours by both reference and clinical strains.
  • Antibiotic treatment initiated immediately after infection showed significantly higher efficacy.
  • Delayed treatment of mature biofilms resulted in reduced antibiotic effectiveness.
  • Microscopic visualization confirmed bacterial aggregate growth during biofilm development.

Conclusions:

  • Mature, antibiotic-tolerant biofilms in IE can form rapidly within 6 hours in this in vitro model.
  • Early antibiotic intervention is crucial for effective IE treatment.
  • This model accelerates the screening of optimal treatment strategies for infective endocarditis.