Sensitivity of the microarray for the detection of genomic DNA from E. coli O15 strain G1383 at 500 ng (panel 1), 100 ng (panel 2), 50 ng (panel 3), and 10 ng (panel 4) and from E. coli O85 strain G1160 at 500 ng (panel 5), 100 ng (panel 6), 50 ng (panel 7), and 10 ng (panel 8).