Rapid identification of Nocardia cyriacigeorgica from a brain abscess patient using MALDI-TOF-MS

Mohammed AlMogbel, Mohammed AlBolbol, Noura Elkhizzi, Hisham AlAjlan, John Philip Hays, Mushtaq Ahmad Khan

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Nocardia cyriacigeorgica (N. cyriacigeorgica) is most frequently associated with human infections, including chronic bronchitis, pulmonary disease and brain abscesses. In general, N. cyriacigeorgica causes infections in immunocompromised individuals and has been reported in clinical samples worldwide. However, the isolation and speciation of N. cyriacigeorgica in the routine diagnostic microbiology laboratory are complicated and time consuming. Recent mass spectrometry techniques such as matrix-assisted laser desorption/ionization time-of-flight-mass spectrometry (MALDI-TOF-MS) have been successfully integrated into many routine diagnostic microbiology laboratories, allowing for the rapid, accurate and simple identification and speciation of many different microorganisms, including difficult-to-identify bacterial species. Here, we present a case report of a 65-year-old female patient from the neurology ward of Prince Sultan Military Medical City in Riyadh, Saudi Arabia, who was infected with N. cyriacigeorgica. The bacterium was successfully identified by MALDI-TOF-MS, with species identification subsequently confirmed by sequence analysis of the 16S ribosomal RNA.

Original languageEnglish
Pages (from-to)359-361
Number of pages3
JournalOxford Medical Case Reports
Issue number10
Publication statusPublished - Oct 1 2020

ASJC Scopus subject areas

  • Parasitology
  • Microbiology
  • Infectious Diseases


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