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Summary
Viridans streptococci can cause serious pulmonary infections like pneumonia, lung abscess, and empyema in both healthy and immunocompromised individuals. Diagnosis relies on microbiological cultures from various respiratory tract samples.
Area of Science:
- Infectious Diseases
- Pulmonology
- Microbiology
Background:
- Viridans streptococci are common commensals of the human oropharynx.
- Infections typically occur in immunocompromised patients, but can also affect healthy individuals.
Observation:
- Two cases of pulmonary parenchymal infections caused by viridans streptococci are presented.
- One patient was a previously healthy adult who developed pleural empyema and lung abscess.
- The second patient was immunocompromised and developed uncomplicated pneumonia.
Findings:
- Diagnosis in the first case was confirmed by percutaneous lung abscess aspiration, transtracheal aspiration, and thoracentesis cultures.
- Diagnosis in the second case was established through transtracheal aspiration culture results.
- These findings highlight the diverse clinical presentations and diagnostic methods for viridans streptococci pulmonary infections.
Implications:
- Viridans streptococci should be considered in the differential diagnosis of pulmonary infections, regardless of host immune status.
- Accurate and timely diagnosis through microbiological sampling is crucial for effective treatment.
- Further research may elucidate specific risk factors and optimal management strategies for these infections.