Evaluation of capacity to detect ability to form biofilm in Candida parapsilosis sensu stricto strains by MALDI-TOF MS

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Authors

MLYNÁRIKOVÁ Katarína ŠEDO Ondrej RŮŽIČKA Filip ZDRÁHAL Zbyněk HOLÁ Veronika MAHELOVÁ Martina

Year of publication 2016
Type Article in Periodical
Magazine / Source Folia Microbiologica
MU Faculty or unit

Faculty of Medicine

Citation
Doi http://dx.doi.org/10.1007/s12223-016-0458-7
Field Microbiology, virology
Keywords FLIGHT MASS-SPECTROMETRY; DESORPTION IONIZATION-TIME; STAPHYLOCOCCUS-EPIDERMIDIS; RAMAN-SPECTROSCOPY; SURFACES; BACTERIA; IDENTIFICATION; ALBICANS; EXPRESSION; DATABASE
Description Matrix assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) is, currently, used as a rapid and reliable tool in microbial diagnostics. The discriminatory power of the method extends its applicability also beyond species level. This study examined the possibility to use MALDI-TOF MS to differentiate between Candida parapsilosis sensu stricto biofilm-positive (n = 12) and biofilm-negative (n = 9) strains. The results indicated a grouping trend within MALDI-TOF mass spectra belonging to each of the tested groups. However, these trends were eclipsed by mass spectral variations resulting from limited repeatability of the method, making its application for the selected purpose impossible. Improvement in the discriminatory power of the method was not obtained neither by using different matrices (alpha-cyano-4-hydroxycinnamic acid, ferulic acid, 5-chloro-2-mercaptobenzothionazole) for MALDI-TOF MS analysis nor by testing different culture conditions (cultivation length, culture media).
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