Lemierre Syndrome With Streptococcus constellatus Bacteremia

Area of Science:

• Infectious Diseases
• Vascular Medicine
• Microbiology

Background:

• Lemierre syndrome is a rare but serious condition involving thrombophlebitis of the internal jugular vein (IJV), typically following oropharyngeal infections.
• While less common due to antibiotic use, it remains a critical differential diagnosis in patients presenting with pharyngitis or related symptoms.
• Early recognition and prompt treatment are crucial to prevent severe complications.

Observation:

• A 20-year-old male with no prior medical history presented with symptoms suggestive of pneumonia.
• Diagnostic workup revealed Lemierre syndrome, characterized by internal jugular vein thrombus and bacteremia.
• The causative agent was identified as Streptococcus constellatus.

Findings:

• The patient developed an internal jugular vein thrombus, a hallmark of Lemierre syndrome.
• Presumed septic emboli were detected in the lungs, indicating systemic spread of infection.
• Streptococcus constellatus bacteremia was confirmed as the underlying cause.

Implications:

• This case underscores the importance of considering Lemierre syndrome in young adults with pharyngitis and pneumonia-like symptoms, even in the absence of typical risk factors.
• Prompt antibiotic therapy, such as ampicillin/sulbactam transitioning to amoxicillin/clavulanate, is essential for managing Streptococcus constellatus bacteremia and IJV thrombosis.
• Increased awareness among clinicians can lead to earlier diagnosis and improved patient outcomes, reducing the risk of severe complications like septic pulmonary emboli.