Abstract
The use of the matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry (MS) generates rapid microbial identification. We are presenting a case of a 63-year-old woman with a medical history of chronic tracheostomy admitted for hypotension and fevers to illustrate the clinical implication of MALDI-TOF MS on bacterial identification. Kerstersia gyiorum was identified from the bronchoalveolar lavage isolate. Kerstersia gyiorum has been isolated from human sputum samples, and may be a previously unrecognized colonizer of the upper respiratory tract. Thus, patients with long-term tracheotomies or who are chronically aspirating may be at risk of lower respiratory infection with this organism. Increased use of MALDI-TOF MS in the clinical setting may increase reporting of this atypical isolate.
Highlights
MALDI-TOF mass spectrometry (MS) provides accurate identification that compares well with that of genomic sequencing
We report isolation and identification of Kerstersia gyiorum by MALDI-TOF MS from a bronchoalveolar lavage isolate in a patient with a chronic tracheostomy
This is the first paper describing K. gyiorum isolated from the lower respiratory tract
Summary
MALDI-TOF MS provides accurate identification that compares well with that of genomic sequencing. The MALDI-TOF MS is quicker, providing identification within 1-2 hours compared to traditional methods or sequencing that may take days for definitive identification. We report isolation and identification of Kerstersia gyiorum by MALDI-TOF MS from a bronchoalveolar lavage isolate in a patient with a chronic tracheostomy. This case confirms the use of MALDITOF MS as a reliable technique for the accurate identification of Kerstersia gyiorum and illustrates the impact of MALDITOF MS on patient management
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