Related Experiment Video
Updated: May 22, 2026
07:46
Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus (MRSA) in Rat
Published on: June 4, 2012
Mitral Valve Endocarditis by Micrococcus luteus: First European Case
Angela Durante1, Mariella Tongiani2, Stefania Baratta3
1Fondazione Toscana Gabriele Monasterio, Pisa, Italy; Fondazione Toscana Gabriele Monasterio, Massa, Italy; Health Science Interdisciplinary Center, Scuola Superiore Sant'Anna, Pisa, Italy.
JACC. Case Reports
|May 21, 2026
Summary
Micrococcus luteus is an emerging cause of infective endocarditis, particularly in elderly patients with pre-existing conditions. Prompt diagnosis and surgical intervention are crucial for successful treatment outcomes.
Area of Science:
- Cardiology
- Infectious Diseases
- Microbiology
Background:
- Infective endocarditis (IE) is a serious infection of the heart valves.
- Elderly patients with comorbidities are at increased risk.
- Atypical pathogens can cause IE, posing diagnostic challenges.
Purpose of the Study:
- To report a case of infective endocarditis caused by Micrococcus luteus.
- To highlight the importance of identifying rare pathogens in IE.
- To emphasize the role of early surgical intervention.
Main Methods:
- A case study of an 88-year-old woman with atrial fibrillation and dyspnea.
- Diagnostic workup included echocardiography and valve tissue culture.
- Treatment involved antibiotics and surgical valve replacement.
Main Results:
- Echocardiography revealed vegetation, severe mitral regurgitation, and mitral leaflet perforation.
- Valve tissue culture identified Micrococcus luteus.
- Successful mitral valve replacement and aortic valve shaving were performed.
Conclusions:
- Micrococcus luteus can be an opportunistic pathogen causing IE in susceptible individuals.
- Early recognition and intervention, including surgery, are vital for optimal outcomes.
- Analysis of valve tissue is essential for identifying emerging pathogens.
Related Concept Videos
01:25Endocarditis I: Introduction
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...
01:25Endocarditis II: Clinical Features of Infective Endocarditis
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...
01:18Endocarditis III: Medical Management
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...
01:26Mitral Stenosis III: Medical Management
Mitral stenosis, a condition marked by the narrowing of the mitral valve, necessitates an integrated approach for effective management. This approach includes preventative measures, medical therapy, and surgical interventions to reduce symptoms and prevent complications.PreventionPrevention of mitral stenosis primarily focuses on reducing the incidence of bacterial infections, particularly streptococcal infections, which can lead to rheumatic fever and subsequent valvular damage. Timely...
01:22Mitral Stenosis I: Introduction
Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
01:29Endocarditis IV: Nursing Management
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...