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Infections caused by Klebsiella ozaenae: a changing disease spectrum
Abstract:
A total of 64 isolates of Klebsiella ozaenae were recovered from 36 patients during a 40-month period. Over 7,500 isolates of K. pneumoniae were isolated during the same time period. Before this decade, K. ozaenae was considered to be only a colonizer of the nasopharynx or a putative cause of ozena (atrophic rhinitis). K. ozaenae was recovered most frequently from sputum in mixed culture but was associated with infection in 12 patients (2 with bacteremia, 3 with urinary tract infection, 1 with soft tissue infection, and 6 with mucopurulent nasal discharge). The spectrum of disease caused by this organism is more extensive than has been appreciated previously.
Insights
Klebsiella ozaenae, previously thought to be a colonizer, is now recognized as a cause of various infections, including bacteremia and urinary tract infections. This finding expands our understanding of Klebsiella ozaenae
Area of Science:
- Microbiology
- Infectious Diseases
- Clinical Bacteriology
Background:
- Klebsiella ozaenae was historically considered a nasopharyngeal colonizer or a cause of ozena (atrophic rhinitis).
- Limited understanding existed regarding the pathogenic potential of K. ozaenae beyond its association with ozena.
Observation:
- A 40-month study identified 64 Klebsiella ozaenae isolates from 36 patients.
- K. ozaenae was frequently recovered from sputum in mixed cultures.
- Infections were documented in 12 patients, including bacteremia, urinary tract infections, soft tissue infections, and mucopurulent nasal discharge.
Findings:
- Klebsiella ozaenae is associated with a broader spectrum of human infections than previously recognized.
- The organism can cause invasive diseases such as bacteremia and localized infections.
Implications:
- Clinical awareness of K. ozaenae as a potential pathogen should be increased.
- Diagnostic and treatment strategies may need to account for the expanded pathogenic role of K. ozaenae.
- Further research is warranted to elucidate the mechanisms of pathogenicity and clinical significance of K. ozaenae.