FIG. 1.
(A) XTT formazan signal (measured at 492 nm) produced by C. albicans (strains M61 and GDH) and C. parapsilosis (strains P/A71 and P92) at concentrations ranging from 105 to 108 cells/ml, using 1-mg/ml (A) and 5-mg/ml (B) XTT stock solutions. The cross indicates a P value of <0.05 for results obtained with M61 and GDH compared with those obtained with P/A71 and P92; a single asterisk indicates a P value of <0.05 for all comparisons except M61 versus GDH; and a double asterisk indicates a P value of <0.05 for results for all strains versus that for P92. Error bars indicate ±1 standard deviation (SD); for clarity, only bars for 108 cells/ml are shown.