Phylogenetic origins of carbon, nitrogen, and phosphorus cycling genes affected significantly by the presence of EcO157 in the biofilm.

aThe sum of normalized signal intensity for all probes detected within the same phylum. The t test was performed between the control- and the EcO157-inoculated biofilm (n = 3) at each sampling time and the significance was labeled at 24-S or 48-S (*PPbDNRA, dissimilatory nitrate reduction;cANRA: assimilatory nitrate reduction. Detailed information regarding all phyla detected for genes involved in carbon degradation, nitrogen cycling and phosphorus utilization are presented in Tables S5, S6, and S7, respectively.