Splenic and Kidney Infarct: Sequelae of Subacute Streptococcus mitis Bacterial Endocarditis

Area of Science:

• Cardiology
• Infectious Diseases
• Microbiology

Background:

• Infective endocarditis (IE) involves heart valve or cardiac device vegetation, often microbial.
• Vegetation forms from platelet and fibrin deposition on the endocardium, harboring microbial colonies.
• Heart valves are the most common site for IE development.

Observation:

• Streptococcus mitis, an oral commensal, can cause IE when mucous membranes are compromised.
• This case details a rare presentation of S. mitis-induced IE.
• The patient was immunocompetent, making the infection unusual.

Findings:

• S. mitis was identified as the causative agent of infective endocarditis.
• The infection led to significant complications in the patient.
• The case underscores the pathogenicity of S. mitis in specific circumstances.

Implications:

• Highlights the importance of considering oral flora in IE etiology, even in immunocompetent individuals.
• Suggests potential for S. mitis to cause severe cardiovascular complications.
• Emphasizes the need for vigilance in managing oral health to prevent systemic infections.