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Attenuation of light transmission with the ionic self-assembled multilayer (ISAM)::probe duplex incubated with lysed cells of Histophilus somni or Escherichia coli. The signal attenuations (percent reduction of signal) resulting from exposure of the ISAM::probe to concentrations of H. somni strain 2336 from 100 CFU to 12,500 CFU were significantly different between each dilution, and with 50,000 CFU of E. coli (p < 0.0001). Error bars represent mean ± 1 SD.
