Legionella indianapolisensis sp. nov., isolated from a patient with pulmonary abscess

R. F. Relich, B. H. Schmitt, H. Raposo, L. Barker, S. J. Blosser, M. May

Research output: Contribution to journalArticle

4 Scopus citations


Background: To date, at least 50 species of Legionella have been described. These organisms are ubiquitous in nature and have been isolated from diverse ecological environments, including man-made structures such as cooling towers and spas. Legionellae have also been isolated from human and veterinary clinical specimens, and their roles in disease are well-established. This report describes the isolation of a novel Legionella species from a respiratory specimen from a patient with influenza and suspected pulmonary embolus. Case: A 68-year-old male presented to an Indianapolis-area hospital with pulmonary disease; upon workup, he was found to have influenza A. Bronchoalveolar lavage fluid was also submitted for conventional bacterial culture and Legionella culture. The patient was prescribed a broad-spectrum antibiotic and recovered. Results: A Legionella-like bacterium was isolated on buffered charcoal yeast extract agar, and mass spectrometry and comparative 16S rRNA gene sequencing inconclusively identified the isolate as a Legionella sp. Further analysis of the 16S rRNA gene confirmed the strain to be a new species, related to Legionella hackeliae. Physiochemical and morphological testing were used to confirm the discovery of a novel species, Legionella indianapolisensis sp. nov., type strain SMNF-IS.

Original languageEnglish (US)
Pages (from-to)26-28
Number of pages3
JournalInternational Journal of Infectious Diseases
StatePublished - Apr 2018


  • Co-infection
  • Influenza
  • Legionella
  • Legionella indianapolisensis
  • Legionellae
  • Lobar pneumonia
  • Pulmonary abscess

ASJC Scopus subject areas

  • Microbiology (medical)
  • Infectious Diseases

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