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Moraxella catarrhalis bacteremic pneumonia.
Hiroki Anezaki1,2, Norohiko Terada1, Takahisa Kawamura3
1Division of Infectious Diseases, Shizuoka Cancer Center Hospital, Suntou-gun, Shizuoka, Japan.
This case report highlights Moraxella catarrhalis bacteremic pneumonia in an elderly patient with comorbidities. Early Gram staining and blood cultures are crucial for diagnosing this gram-negative cocci infection.
Area of Science:
- Medical Microbiology
- Infectious Diseases
- Pulmonology
Background:
- Elderly patients with comorbidities like lung cancer and emphysema are susceptible to infections.
- Fever and chills without a clear source necessitate thorough microbiological investigation.
Purpose of the Study:
- To report a case of Moraxella catarrhalis bacteremic pneumonia.
- To emphasize the diagnostic utility of Gram staining and blood cultures.
Main Methods:
- Blood culture and Gram stain of sputum smear were performed.
- Clinical presentation and patient history were analyzed.
- Differential diagnosis excluded Neisseria species.
Main Results:
- Gram-negative cocci were identified in blood and sputum.
- Moraxella catarrhalis was diagnosed as the causative agent.
- Patient was successfully treated with intravenous ceftriaxone.
Conclusions:
- Moraxella catarrhalis can cause serious infections, including bacteremic pneumonia.
- Gram staining of sputum and blood cultures are essential diagnostic tools.
- Consider Moraxella catarrhalis in the differential diagnosis of gram-negative cocci in respiratory and blood samples.
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