Acute Bacterial Meningitis and Systemic Abscesses due to Streptococcus dysgalactiae subsp. equisimilis Infection

Area of Science:

• Infectious Diseases
• Microbiology
• Clinical Medicine

Background:

• Group G Streptococcus dysgalactiae is a rare cause of human infections, often associated with severe outcomes like meningitis and high mortality rates.
• Disseminated infections can occur, particularly in immunocompromised individuals, with skin entry being a potential route.

Observation:

• A 57-year-old patient with liver cirrhosis presented with disseminated abscesses caused by Streptococcus dysgalactiae.
• The patient exhibited meningitis, ventriculitis, spondylodiscitis, septic arthritis, and soft-tissue infections, but notably no endocarditis.
• Cirrhosis-related immune suppression was identified as a likely contributing factor to the severity of the infection.

Findings:

• Streptococcus dysgalactiae can lead to severe, disseminated infections beyond typical pharyngeal manifestations.
• The absence of endocarditis in this case, despite disseminated infection, contrasts with some literature reports.
• Long-term antimicrobial therapy (3 months) was effective in resolving the patient's extensive infections.

Implications:

• This case underscores the potential for Streptococcus dysgalactiae to cause severe invasive disease in immunocompromised hosts.
• Early recognition and aggressive antimicrobial treatment are crucial for managing Streptococcus dysgalactiae infections, even in complex cases.
• Further research into the pathogenesis and optimal management strategies for Streptococcus dysgalactiae infections in cirrhotic patients is warranted.