FIG 3.
Cecal contents of factory-raised and free-ranging domestic turkeys contain high levels of E. coli DNA compared to those of wild birds. Quantitative PCR was performed for the ybbW gene (E. coli specific) detected in total genomic DNA isolated from the ceca of factory-raised domestic, free-range domestic, and wild turkeys. Threshold cycle (CT) values from individual birds are shown on the y axis. Average CT values of each group are indicated by a horizontal bar. CT values of the positive control (100% E. coli genomic DNA) and negative control are indicated on the x axis.