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[Pneumonia caused by Moraxella subgenus Moraxella sp].
K Yamazaki1, S Y Murayama, S Kimura
1Clinical Laboratory, Omiya Red Cross Hospital.
Summary
A rare bacterial pneumonia caused by Moraxella subgenus Moraxella was identified in a patient with congestive heart failure. This Moraxella strain produced a BRO-type beta-lactamase, indicating antibiotic resistance.
Area of Science:
- Microbiology
- Infectious Diseases
- Cardiology
Background:
- Pneumonia is a common infection, but rare cases can be caused by unusual bacteria.
- Idiopathic dilated cardiomyopathy can lead to congestive heart failure, increasing susceptibility to infections.
Observation:
- A 43-year-old male with congestive heart failure presented with pneumonia.
- Sputum analysis revealed pure culture of Moraxella subgenus Moraxella.
- Chest X-ray showed infiltrates in the right middle, and left upper and middle lobes.
Findings:
- The patient exhibited increased white blood cell (WBC) count and elevated C-reactive protein (CRP) levels.
- Gram stain and bacterial findings confirmed Moraxella subgenus Moraxella as the causative agent of bacterial pneumonia.
- The isolated Moraxella strain produced a BRO-type beta-lactamase, a carbenicillinase-type enzyme, suggesting potential antibiotic resistance.
Implications:
- This case highlights Moraxella subgenus Moraxella as a potential pathogen in pneumonia, particularly in immunocompromised or medically complex patients.
- The presence of BRO-type beta-lactamase in this strain necessitates careful antibiotic selection for effective treatment.
- Further research into the prevalence and resistance patterns of Moraxella species in respiratory infections is warranted.