Human infective endocarditis and septic shock caused by Streptococcus suis serotype 1

Area of Science:

• Infectious Diseases
• Cardiology
• Microbiology

Background:

• Streptococcus suis (SS) is a zoonotic bacterium causing acute infections.
• Infective endocarditis due to SS is uncommon.
• No prior reports exist of Streptococcus suis Serotype 1 (SS1) causing mitral valve infection.

Purpose of the Study:

• To report a rare case of mitral valve endocarditis caused by SS1.
• To highlight the atypical virulence and rapid progression of SS1 infection in this case.
• To emphasize the importance of early diagnosis and appropriate treatment for SS endocarditis.

Main Methods:

• Case report detailing clinical presentation, diagnostic workup, and treatment of a patient with SS1 mitral valve endocarditis.
• Review of existing literature on SS infections and endocarditis.

Main Results:

• The patient presented with rapid progression of infection and severe mitral valve damage.
• This presentation contrasts with the generally accepted lower virulence of SS1.
• Successful management involved targeted antibiotic therapy based on drug sensitivity testing.

Conclusions:

• Streptococcus suis Serotype 1 can cause severe and rapidly progressing infective endocarditis.
• Early diagnosis and tailored antibiotic treatment are critical for effective management.
• Surgical intervention may be necessary for significant valve damage to prevent heart failure.