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Nocardia veterana, a new emerging pathogen.

Sudha Pottumarthy1, Ajit P Limaye, Jennifer L Prentice

  • 1Department of Laboratory Medicine, University of Washington, Seattle, Washington 98195, USA.

Journal of Clinical Microbiology
|April 12, 2003
PubMed
Summary

Nocardia veterana, a newly identified bacterium, caused pulmonary disease in three patients. Accurate species-level identification is crucial, as N. veterana may be misidentified by standard methods.

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Area of Science:

  • Medical Microbiology
  • Infectious Diseases

Background:

  • Nocardia veterana is a recently identified species.
  • The clinical significance of N. veterana was previously underestimated.

Observation:

  • Three cases of pulmonary disease caused by N. veterana are presented.
  • Patients included two immunocompromised individuals with pulmonary nodules and one with chronic pulmonary disease exacerbation.

Findings:

  • N. veterana isolates showed susceptibility to several antibiotics but reduced susceptibility to others.
  • Phenotypic identification was limited to the Nocardia genus level.
  • Molecular methods (PCR, 16S rRNA sequencing) confirmed N. veterana identification.
  • Susceptibility and restriction enzyme profiles suggested potential misidentification as Nocardia nova.

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Implications:

  • These cases highlight the pathogenic potential of Nocardia veterana.
  • Accurate species-level identification of Nocardia is essential for appropriate patient management.
  • Integrated phenotypic and genotypic methods are recommended for reliable Nocardia identification.