Infective endocarditis due to neisseria elongata

Amit Noheria, Peter W. Anderson, Gino G. Tapia-Zegarra, Larry M. Baddour, Walter R. Wilson

Research output: Contribution to journalReview articlepeer-review


We present 2 cases of prosthetic valve endocarditis due to Neisseria elongata subspecies nitroreducens and elongata. Neisseria elongata is a fastidious, immotile, oxidase-positive, gram-negative bacillus found in the human oropharyngeal flora that is a rare cause of infective endocarditis. It is distinguished from Kingella kingae, Eikenella corrodens, and other organisms based on extended biochemical testing and 16S recombinant DNA sequencing. We review the literature on N. elongata endocarditis and highlight the similarities between N. elongata and HACEK organisms regarding their biochemical profiles and clinical features of infective endocarditis.

Original languageEnglish
Pages (from-to)355-358
Number of pages4
JournalInfectious Diseases in Clinical Practice
Issue number6
StatePublished - Nov 1 2010


  • Neisseria elongata
  • endocarditis
  • prosthetic valve


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