1<p>MFI, median fluorescence intensity (raw data); SD, standard deviation.</p>2<p>The ratio is the positive average median fluorescence intensity (MFI) divided by the negative average MFI.</p>3<p>Due to partial identity with spacer STMB34, the signal of pSTMB26 is stronger in isolates containing spacer STMB34 (such as the emergent monophasic population). This has been taken into account by subtracting the MFI of control strain <b>#</b>02-7015 from that of pSTMB26 in each experiment. The corrected median is 183±46 with a ratio of 20.</p>4<p>Median calculated for 24 isolates.</p>5<p>Median calculated for 20 isolates.</p
