FIG 1.

Dendrogram showing the PFGE patterns (KpnI) of C. jejuni isolates from feces of feedlot cattle and starlings. The clone SA strains are represented by two closely associated PFGE patterns (I and II), as was the case for sheep clone SA isolates (29). IA3902 is a known isolate of clone SA and was used as a reference. The isolates' names are listed on the right of the dendrogram. Starling isolates are marked with stars. TX, Texas; CO, Colorado; MO, Missouri; IA, Iowa; KS, Kansas; FC, feedlot cattle; ST, starling. The numbers in the names of the isolates are arbitrary numbers assigned to feedlots and samples. Please note that the starling isolates represent the total C. jejuni population isolated from the birds, while the cattle isolates included in the PFGE analysis were preselected for putative clones SA by the PCR.