Results of genus-specific PCR. (A) Primers specific for C. helveticus amplified 16S rRNA PCR products from 12 of 17 cat fecal isolates. Lane MW, 1-kb DNA ladder; lane 1, reagent control; lane 2, positive control; lanes 3 to 19, isolates from cat feces. (B) Primers specific for C. upsaliensis amplified 16S rRNA products from 8 of 17 isolates from cat feces. Lane MW, 1-kb DNA ladder; lane 1, reagent control; lane 2, positive control; lanes 3 to 19, isolates from cat feces. (C) Primers specific for C. jejuni amplified hippuricase gene PCR products from 3 of 17 cat isolates. Lane MW, 1-kb DNA ladder; lane 1, reagent control; lane 2, positive control; lanes 3 to 19, isolates from cat feces.