Streptococcus intermedius: unusual presentation and complication of lung abscess

Area of Science:

• Infectious Diseases
• Pulmonology
• Spinal Surgery

Background:

• Streptococcus intermedius is a bacterium commonly associated with oral and respiratory infections.
• Pulmonary infections caused by S. intermedius can lead to complications like lung abscesses, particularly in older individuals.

Observation:

• A 54-year-old immunocompetent male presented with persistent chest pain radiating to the lower back.
• Imaging revealed a right lower lobe lung mass with direct extension to the T5-T6 vertebrae.
• Histopathology confirmed organizing pneumonia with abscess, and cultures identified S. intermedius.

Findings:

• The patient's lung abscess was caused by Streptococcus intermedius.
• The infection spread contiguously from the lung abscess to the T5-T6 vertebral bodies, causing discitis.
• This represents a rare instance of S. intermedius-induced discitis originating from a lung abscess.

Implications:

• This case underscores the potential for S. intermedius lung infections to cause serious contiguous spinal infections, even in immunocompetent individuals.
• It highlights the importance of considering spinal involvement in patients with posterior lung abscesses.
• Early recognition and appropriate treatment are crucial for managing this rare but severe complication.