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Table 5 Cutoff value of the probe

From: Detection and identification of enterohemorrhagic Escherichia coli O157:H7 and Vibrio cholerae O139 using oligonucleotide microarray

Target gene Species Average of negative bacteria and blank control signal intensity SD Cutoff valuea
ctxA Vibrio cholerae O139 1783.12 64.27 1847.39
TcpA   1739.338 68.253 1807.591
LPSgt   1637.29 57.175 1694.465
stx1 Escherichia coli 1691.284 71.22 1762.504
Stx2 O157:H7 1790.385 78.473 1868.858
UidA   1802.1746 69.181 1871.3556
16S rDNA internal control 1598.5629 24.75 1623.3129
  1. a cutoff value = average of negative bacteria and blank control signal intensity + 2 SD