Cocolonization of cats by Campylobacter spp. and Helicobacter spp. (A) Campylobacter genus-specific primers were used to amplify DNA extracted from cat fecal isolates. Lane MW, 100-bp DNA ladder; lane 1, reagent control; lane 2, Campylobacter-positive control; lanes 3 to 19, isolates from cat feces. (B) Helicobacter genus-specific primers were used to amplify DNA extracted from cat fecal isolates. Lane MW, 1-kb DNA ladder; lane 2, Helicobacter-positive control; lane 3, reagent control; lanes 3 to 19, isolates from cat feces.