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Rapid identification of clinical members of Fusarium fujikuroi complex using MALDI-TOF MS

Al-Hatmi, A.M.S.
Normand, A-C
van Diepeningen, A.D.
Hendrickx, Marijke
de Hoog, G.S.
Piarroux, R.
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Abstract

AIM: To develop the matrix-assisted laser desorption ionization mass spectrometry (MALDI-TOF MS) method for identification of Fusarium species within Fusarium fujikuroi complex for use in clinical microbiology laboratories. MATERIALS & METHODS: A total of 24 reference and 60 clinical and environmental isolates belonging to the F. fujikuroi complex were subjected to MALDI-TOF MS identification. Protein extracts of Fusarium isolates were obtained using formic acid extraction. Multilocus sequence analysis was used as a gold standard. RESULTS: The MALDI-TOF MS Biotyper correctly identified 93.6% of the strains down to the species level, while the remaining isolates (6.4%) were identified at the genus level when using scores of >/= 2.0 as cut-off values. Correct identification was obtained despite large intraspecific heterogeneities in MALDI-TOF spectra. CONCLUSION: MALDI-TOF MS is a rapid identification tool for the recognition of species within F. fujikuroi complex, provided a database is available

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2015-12-01
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acid, analysi, analysis, article, AS, at, Belgium, Bruxelles, Clinical, cutoff, Database, de, Ecosystem, electronic, environmental, France, Fusarium, general, health, health services, Health-services, Heterogeneity, hospital, identification, im, Institute, IS, journal, Laboratories, LEVEL, MALDI-TOF, MALDI-TOF MS, Mass, Mass Spectrometry, medical, Medical mycology, method, methods, microbiology, MS, Mycology, Netherlands, protein, public, public health, Public-health, Research, result, results, SB - IM, Science, Score, Sequence Analysis, Service, Services, Species, STANDARD, strain, The Netherlands, Universities, university, use, values
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