Identification of individual biofilm-forming bacterial cells using Raman tweezers.
A method for in vitro identification of individual bacterial cells is presented. The method is based on a combination of optical tweezers for spatial trapping of individual bacterial cells and Raman microspectroscopy for acquisition of spectral “Raman fingerprints” obtained from the trapped cell. Here, Raman spectra were taken from the biofilm-forming cells without the influence of an extracellular matrix and were compared with biofilm-negative cells. Results of principal component analyses of Raman spectra enabled us to distinguish between the two strains of Staphylococcus epidermidis. Thus, we propose that Raman tweezers can become the technique of choice for a clearer understanding of the processes involved in bacterial biofilms which constitute a highly privileged way of life for bacteria, protected from the external environment.
Institute of Scientific Instruments of the AS CR, v.v.i., Královopolská 147, 612 64 Brno, Czech Republic.
Ota
O
Samek
Institute of Scientific Instruments of the AS CR, v.v.i., Královopolská 147, 612 64 Brno, Czech Republic.
Silvie
S
Bernatová
Institute of Scientific Instruments of the AS CR, v.v.i., Královopolská 147, 612 64 Brno, Czech Republic.
Jan
J
Ježek
Institute of Scientific Instruments of the AS CR, v.v.i., Královopolská 147, 612 64 Brno, Czech Republic.
Martin
M
Šiler
Institute of Scientific Instruments of the AS CR, v.v.i., Královopolská 147, 612 64 Brno, Czech Republic.
Mojmir
M
Šerý
Institute of Scientific Instruments of the AS CR, v.v.i., Královopolská 147, 612 64 Brno, Czech Republic.
Vladislav
V
Krzyžánek
Institute of Scientific Instruments of the AS CR, v.v.i., Královopolská 147, 612 64 Brno, Czech Republic.
Kamila
K
Hrubanová
Institute of Scientific Instruments of the AS CR, v.v.i., Královopolská 147, 612 64 Brno, Czech Republic.
Pavel
P
Zemánek
Masaryk University and St. Anne's Faculty Hospital, Department of Microbiology, Faculty of Medicine, Pekarská 53, 656 91 Brno, Czech Republic.
Veronika
V
Holá
Masaryk University and St. Anne's Faculty Hospital, Department of Microbiology, Faculty of Medicine, Pekarská 53, 656 91 Brno, Czech Republic.
Filip
F
Růžička
D000465:Algorithms; D001419:Bacteria / Q000378:metabolism*; D018407:Bacterial Physiological Phenomena; D018441:Biofilms; D002448:Cell Adhesion; D006358:Hot Temperature; D052898:Optical Tweezers; D010587:Phagocytosis; D011134:Polysaccharides / Q000737:chemistry; D025341:Principal Component Analysis; D013059:Spectrum Analysis, Raman; D013212:Staphylococcus epidermidis / Q000378:metabolism*
D011134:Polysaccharides