6%), C. krusei (8%), C. tropicalis (7.7%), Saccharomyces cerevisiae (3.1%), C. parapsilosis (2.5%), and C. lusitaniae (2%) were represented by at least 35 isolates each, whereas the less GSK2118436 frequently isolated species C. guilliermondii (1.3%) and C. pelliculosa (1%) were represented by at least 15 isolates each. A few isolates of C. orthopsilosis and C. metapsilosis were also included into the study later, when described as cryptic species of C. parapsilosis

[13]. See also additional file 4: Listing of clinical isolates and reference strains included in this study. The strains were stored in 20% BBL Skim Milk Powder supplemented with glycerol (BD, Franklin Lakes, New Jersey, USA) at -70°C until used. Phenotypic identification All of the isolates were identified using conventional phenotypic identification techniques, i.e. evaluation of micromorphology on rice agar and evaluation of biochemical properties using in-house prepared assimilation and fermentation tests [26] followed by interpretation using the identification key according to Fragner [27]. Selected isolates were also identified using the ID 32C commercial set (bioMérieux, Marcy l’Etoile, France) in accordance with manufacturer’s instructions. DNA extraction Crude colony lysates described earlier as suitable

for amplification were prepared MK-0518 concentration by simple toothpick technique [7]. Briefly, a part of colony grown on SGA plate was picked up by a micropipette tip at latest one day after inoculation and transferred into 5 μl of freshly prepared lysing solution (1 M sorbitol, 5 mM MgCl2, 2 mM dithiothreitol, 12 U of Zymolyase, all from Sigma-Aldrich, St. Louis, Missouri, USA). The mixture was incubated for 30 min at 37°C and centrifuged (10,000 g for Rebamipide 5 min).

The supernatant was transferred into a new tube, diluted with TE buffer to 300 μl and stored at -20°C until used. For comparison and reference, YeaStar Genomic DNA Kit (Zymo Research, Orange, California, USA) was also used for DNA extraction in selected strains following manufacturer’s recommendations. Briefly, 1 ml of yeast submerged culture (approx. 1.5 × 107 cells) grown in YPG (1% of each yeast extract, peptone and glucose) in an Erlenmeyer flask shaken at 30°C was spun down and the pellet was subjected to enzyme lysis in 120 μl of YD Digestion Buffer (containing RNase A and Zymolyase) for 1 hour at 37°C. Then, 120 μl of YD Lysis Buffer and 250 μl of chloroform were added, mixed and spun down again. The aqueous supernatant was then loaded onto a fast spin-column, spun down, and the impurities were find more washed away using DNA Wash Buffer. Finally, DNA was eluted by 60 μl of water. McRAPD procedure PCR reaction was performed in a glass capillary in a total volume of 10 μl consisting of 0.5 μM primer ACGGGCCAGT [21], 10 mM Tris-HCl (pH 8.8), 50 mM KCl, 0.1% Triton X-100, 2 mM MgCl2, 200 μM of each dNTP, 2.5 U of Taq polymerase Unis (Top-Bio, Prague, Czech Republic), 250 μg/ml BSA and LCGreen dye at 1× concentration (Idaho Technology Inc.