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Mycotic Aneurysm Caused by Streptococcus constellatus subsp. constellatus
Wen-Chu Chiang1, Jui-Chang Tsai, Shey-Ying Chen
1Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan.
Journal of Clinical Microbiology
|April 9, 2004
Summary
A rare case of infected mycotic aneurysm caused by Streptococcus constellatus subsp. constellatus is presented. This finding highlights a previously unreported pathogen responsible for this serious vascular infection.
Area of Science:
- Cardiovascular Medicine
- Infectious Diseases
- Microbiology
Background:
- Mycotic aneurysms are rare but serious infections of the aorta.
- Streptococcus constellatus subsp. constellatus is not a commonly reported cause of mycotic aneurysms.
Observation:
- An 87-year-old woman presented with abdominal pain and a large thoracic-abdominal aortic aneurysm with mural thrombus.
- The patient had an infected mycotic aneurysm.
Findings:
- Isolates from blood cultures and debrided tissue were identified as Streptococcus constellatus subsp. constellatus.
- Identification was confirmed through biochemical profiling, 16S rRNA gene sequencing, and groESL gene sequencing.
Implications:
- This case expands the known spectrum of pathogens causing mycotic aneurysms.
- Highlights the importance of considering less common bacteria in the diagnosis and treatment of aortic infections.