Table 2.

Light exposure influence on PMA treatment of signal suppression of dead cells of E. coli O157:H7 in PMA-qPCR^a.

Light exposure (min)	CT value ± SDb
	Dead cells	Viable cells
0.0	29.79 ± 0.31	24.73 ± 0.35
0.5	30.32 ± 0.21	24.44 ± 0.21
1.0	29.78 ± 0.25	24.95 ± 0.59
2.0	30.21 ± 0.75	25.20 ± 0.48
4.0	30.21 ± 0.38	25.54 ± 0.47
No PMA control	24.32 ± 0.57	23.24 ± 0.12

^aPMA concentration used in the experiment was 50 μM.

^bThe average of C_T values of triplicate.